Probing the Atom : : Interactions of Coupled States, Fast Beams, and Loose Electrons / / Mark P. Silverman.

The many-faceted efforts to understand the structure and interactions of atoms over the past hundred years have contributed decisively and dramatically to the explosive development of physics. There is hardly a branch of modern physical science that does not in some seminal way rely on the fundament...

Full description

Saved in:
Bibliographic Details
Superior document:Title is part of eBook package: De Gruyter Princeton University Press eBook-Package Backlist 2000-2013
VerfasserIn:
Place / Publishing House:Princeton, NJ : : Princeton University Press, , [2022]
©2000
Year of Publication:2022
Language:English
Online Access:
Physical Description:1 online resource (248 p.) :; 5 tables, 69 line illus.
Tags: Add Tag
No Tags, Be the first to tag this record!
id 9780691228266
lccn 2021694929
ctrlnum (DE-B1597)576631
(OCoLC)1312727174
collection bib_alma
record_format marc
spelling Silverman, Mark P., author. aut http://id.loc.gov/vocabulary/relators/aut
Probing the Atom : Interactions of Coupled States, Fast Beams, and Loose Electrons / Mark P. Silverman.
Princeton, NJ : Princeton University Press, [2022]
©2000
1 online resource (248 p.) : 5 tables, 69 line illus.
text txt rdacontent
computer c rdamedia
online resource cr rdacarrier
text file PDF rda
Frontmatter -- Contents -- Preface: In at the Beginnings -- CHAPTER 1 Energies and Spectral Lines -- CHAPTER 2 The Driven Two-Level Atom -- CHAPTER 3 The Driven Multilevel Atom -- CHAPTER 4 Multiple-Quantum Transitions -- CHAPTER 5 The Decay of Coupled States -- CHAPTER 6 Optical Detection Theory -- CHAPTER 7 State Selection and Lineshape Resolution -- CHAPTER 8 Elements of Experimental Design and Application -- Index
restricted access http://purl.org/coar/access_right/c_16ec online access with authorization star
The many-faceted efforts to understand the structure and interactions of atoms over the past hundred years have contributed decisively and dramatically to the explosive development of physics. There is hardly a branch of modern physical science that does not in some seminal way rely on the fundamental principles and mathematical and experimental insights that derive from these studies. In particular, the drive to understand the singular features of the hydrogen atom--simultaneously the archetype of all atoms and the least typical atom--spurred many of the twentieth century's advances in physics and chemistry. This book gives an in-depth account of the author's own penetrating experimental and theoretical investigations of the hydrogen atom, while simultaneously providing broad lessons in the application of quantum mechanics to atomic structure and interactions. A pioneer in the combined use of atomic accelerators and radiofrequency spectroscopy for probing the internal structure of the hydrogen atom, Mark Silverman examines the general principles behind this far-reaching experimental approach. Fast-moving protons are directed into gas or foil targets from which they capture electrons to become hydrogen atoms moving uniformly at very high speeds. During their rapid passage through the spectroscopy chamber of the atomic accelerator, these atoms reveal by the light they emit fascinating details of their internal configuration and the interactions that created them. Silverman examines the effects of radiofrequency fields on the hydrogen atom clearly and systematically, explaining the details of these interactions at different levels of complexity and refinement, each level illuminating the physical processes involved from different and complementary perspectives. Readers interested in diverse areas of physics and physical chemistry will appreciate both the theoretical and practical implications of Silverman's studies and the personal style with which he relays them. This is a work of not only an outstanding research physicist, but a fine teacher who understands how curiosity underlies all science.
Mode of access: Internet via World Wide Web.
In English.
Description based on online resource; title from PDF title page (publisher's Web site, viewed 29. Jun 2022)
Atomic structure.
SCIENCE / Physics / General. bisacsh
Back-Goudsmit effect.
Bohr magneton.
Bohr radius.
Clebsch-Gordan coefficient.
Dirac zeta function.
Doppler broadening.
Fermi contact interaction.
Fermi golden rule.
Gaussian lineshape.
Green's function.
Hermitian operator.
Huygen's principle.
Laplace equation.
Pauli spin matrices.
Ramsay method.
Stark effect.
Thomas precession.
acceleration potential.
angular distribution function.
annihilation operator.
anticommutator.
antiresonant frequency.
basis states.
coherence terms.
collisional broadening.
counter-rotating frame.
density matrix.
detection operator.
diamagnetic interaction.
efficiency matrix.
eigenvalue problem.
extraction potential.
field mode density.
fine structure constant.
gas target.
gyromagnetic ratio.
helicity.
impedance mismatch.
interaction representation.
level anticrossing.
lineshape narrowing.
occupation probabilities.
optical signal function.
paraxial ray equation.
periodic table.
polarization of the vacuum.
power saturation curve.
quantum interference.
quantum numbers.
reflection coefficient.
resonant frequency.
selection rules.
Title is part of eBook package: De Gruyter Princeton University Press eBook-Package Backlist 2000-2013 9783110442502
Title is part of eBook package: De Gruyter Princeton University Press eBook-Package Gap Years 9783110784237
https://doi.org/10.1515/9780691228266?locatt=mode:legacy
https://www.degruyter.com/isbn/9780691228266
Cover https://www.degruyter.com/document/cover/isbn/9780691228266/original
language English
format eBook
author Silverman, Mark P.,
Silverman, Mark P.,
spellingShingle Silverman, Mark P.,
Silverman, Mark P.,
Probing the Atom : Interactions of Coupled States, Fast Beams, and Loose Electrons /
Frontmatter --
Contents --
Preface: In at the Beginnings --
CHAPTER 1 Energies and Spectral Lines --
CHAPTER 2 The Driven Two-Level Atom --
CHAPTER 3 The Driven Multilevel Atom --
CHAPTER 4 Multiple-Quantum Transitions --
CHAPTER 5 The Decay of Coupled States --
CHAPTER 6 Optical Detection Theory --
CHAPTER 7 State Selection and Lineshape Resolution --
CHAPTER 8 Elements of Experimental Design and Application --
Index
author_facet Silverman, Mark P.,
Silverman, Mark P.,
author_variant m p s mp mps
m p s mp mps
author_role VerfasserIn
VerfasserIn
author_sort Silverman, Mark P.,
title Probing the Atom : Interactions of Coupled States, Fast Beams, and Loose Electrons /
title_sub Interactions of Coupled States, Fast Beams, and Loose Electrons /
title_full Probing the Atom : Interactions of Coupled States, Fast Beams, and Loose Electrons / Mark P. Silverman.
title_fullStr Probing the Atom : Interactions of Coupled States, Fast Beams, and Loose Electrons / Mark P. Silverman.
title_full_unstemmed Probing the Atom : Interactions of Coupled States, Fast Beams, and Loose Electrons / Mark P. Silverman.
title_auth Probing the Atom : Interactions of Coupled States, Fast Beams, and Loose Electrons /
title_alt Frontmatter --
Contents --
Preface: In at the Beginnings --
CHAPTER 1 Energies and Spectral Lines --
CHAPTER 2 The Driven Two-Level Atom --
CHAPTER 3 The Driven Multilevel Atom --
CHAPTER 4 Multiple-Quantum Transitions --
CHAPTER 5 The Decay of Coupled States --
CHAPTER 6 Optical Detection Theory --
CHAPTER 7 State Selection and Lineshape Resolution --
CHAPTER 8 Elements of Experimental Design and Application --
Index
title_new Probing the Atom :
title_sort probing the atom : interactions of coupled states, fast beams, and loose electrons /
publisher Princeton University Press,
publishDate 2022
physical 1 online resource (248 p.) : 5 tables, 69 line illus.
contents Frontmatter --
Contents --
Preface: In at the Beginnings --
CHAPTER 1 Energies and Spectral Lines --
CHAPTER 2 The Driven Two-Level Atom --
CHAPTER 3 The Driven Multilevel Atom --
CHAPTER 4 Multiple-Quantum Transitions --
CHAPTER 5 The Decay of Coupled States --
CHAPTER 6 Optical Detection Theory --
CHAPTER 7 State Selection and Lineshape Resolution --
CHAPTER 8 Elements of Experimental Design and Application --
Index
isbn 9780691228266
9783110442502
9783110784237
callnumber-first Q - Science
callnumber-subject QC - Physics
callnumber-label QC173
callnumber-sort QC 3173.4 A87
url https://doi.org/10.1515/9780691228266?locatt=mode:legacy
https://www.degruyter.com/isbn/9780691228266
https://www.degruyter.com/document/cover/isbn/9780691228266/original
illustrated Illustrated
dewey-hundreds 500 - Science
dewey-tens 530 - Physics
dewey-ones 539 - Modern physics
dewey-full 539/.14
dewey-sort 3539 214
dewey-raw 539/.14
dewey-search 539/.14
doi_str_mv 10.1515/9780691228266?locatt=mode:legacy
oclc_num 1312727174
work_keys_str_mv AT silvermanmarkp probingtheatominteractionsofcoupledstatesfastbeamsandlooseelectrons
status_str n
ids_txt_mv (DE-B1597)576631
(OCoLC)1312727174
carrierType_str_mv cr
hierarchy_parent_title Title is part of eBook package: De Gruyter Princeton University Press eBook-Package Backlist 2000-2013
Title is part of eBook package: De Gruyter Princeton University Press eBook-Package Gap Years
is_hierarchy_title Probing the Atom : Interactions of Coupled States, Fast Beams, and Loose Electrons /
container_title Title is part of eBook package: De Gruyter Princeton University Press eBook-Package Backlist 2000-2013
_version_ 1770176349859741696
fullrecord <?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>07127nam a22013215i 4500</leader><controlfield tag="001">9780691228266</controlfield><controlfield tag="003">DE-B1597</controlfield><controlfield tag="005">20220629043637.0</controlfield><controlfield tag="006">m|||||o||d||||||||</controlfield><controlfield tag="007">cr || ||||||||</controlfield><controlfield tag="008">220629t20222000nju fo d z eng d</controlfield><datafield tag="010" ind1=" " ind2=" "><subfield code="a">2021694929</subfield></datafield><datafield tag="020" ind1=" " ind2=" "><subfield code="a">9780691228266</subfield></datafield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1515/9780691228266</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-B1597)576631</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(OCoLC)1312727174</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-B1597</subfield><subfield code="b">eng</subfield><subfield code="c">DE-B1597</subfield><subfield code="e">rda</subfield></datafield><datafield tag="041" ind1="0" ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="044" ind1=" " ind2=" "><subfield code="a">nju</subfield><subfield code="c">US-NJ</subfield></datafield><datafield tag="050" ind1="0" ind2="0"><subfield code="a">QC173.4.A87</subfield></datafield><datafield tag="050" ind1=" " ind2="4"><subfield code="a">QC173.4.A87</subfield></datafield><datafield tag="072" ind1=" " ind2="7"><subfield code="a">SCI055000</subfield><subfield code="2">bisacsh</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">539/.14</subfield><subfield code="2">22</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Silverman, Mark P., </subfield><subfield code="e">author.</subfield><subfield code="4">aut</subfield><subfield code="4">http://id.loc.gov/vocabulary/relators/aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Probing the Atom :</subfield><subfield code="b">Interactions of Coupled States, Fast Beams, and Loose Electrons /</subfield><subfield code="c">Mark P. Silverman.</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="a">Princeton, NJ : </subfield><subfield code="b">Princeton University Press, </subfield><subfield code="c">[2022]</subfield></datafield><datafield tag="264" ind1=" " ind2="4"><subfield code="c">©2000</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">1 online resource (248 p.) :</subfield><subfield code="b">5 tables, 69 line illus.</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">computer</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">online resource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="347" ind1=" " ind2=" "><subfield code="a">text file</subfield><subfield code="b">PDF</subfield><subfield code="2">rda</subfield></datafield><datafield tag="505" ind1="0" ind2="0"><subfield code="t">Frontmatter -- </subfield><subfield code="t">Contents -- </subfield><subfield code="t">Preface: In at the Beginnings -- </subfield><subfield code="t">CHAPTER 1 Energies and Spectral Lines -- </subfield><subfield code="t">CHAPTER 2 The Driven Two-Level Atom -- </subfield><subfield code="t">CHAPTER 3 The Driven Multilevel Atom -- </subfield><subfield code="t">CHAPTER 4 Multiple-Quantum Transitions -- </subfield><subfield code="t">CHAPTER 5 The Decay of Coupled States -- </subfield><subfield code="t">CHAPTER 6 Optical Detection Theory -- </subfield><subfield code="t">CHAPTER 7 State Selection and Lineshape Resolution -- </subfield><subfield code="t">CHAPTER 8 Elements of Experimental Design and Application -- </subfield><subfield code="t">Index</subfield></datafield><datafield tag="506" ind1="0" ind2=" "><subfield code="a">restricted access</subfield><subfield code="u">http://purl.org/coar/access_right/c_16ec</subfield><subfield code="f">online access with authorization</subfield><subfield code="2">star</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">The many-faceted efforts to understand the structure and interactions of atoms over the past hundred years have contributed decisively and dramatically to the explosive development of physics. There is hardly a branch of modern physical science that does not in some seminal way rely on the fundamental principles and mathematical and experimental insights that derive from these studies. In particular, the drive to understand the singular features of the hydrogen atom--simultaneously the archetype of all atoms and the least typical atom--spurred many of the twentieth century's advances in physics and chemistry. This book gives an in-depth account of the author's own penetrating experimental and theoretical investigations of the hydrogen atom, while simultaneously providing broad lessons in the application of quantum mechanics to atomic structure and interactions. A pioneer in the combined use of atomic accelerators and radiofrequency spectroscopy for probing the internal structure of the hydrogen atom, Mark Silverman examines the general principles behind this far-reaching experimental approach. Fast-moving protons are directed into gas or foil targets from which they capture electrons to become hydrogen atoms moving uniformly at very high speeds. During their rapid passage through the spectroscopy chamber of the atomic accelerator, these atoms reveal by the light they emit fascinating details of their internal configuration and the interactions that created them. Silverman examines the effects of radiofrequency fields on the hydrogen atom clearly and systematically, explaining the details of these interactions at different levels of complexity and refinement, each level illuminating the physical processes involved from different and complementary perspectives. Readers interested in diverse areas of physics and physical chemistry will appreciate both the theoretical and practical implications of Silverman's studies and the personal style with which he relays them. This is a work of not only an outstanding research physicist, but a fine teacher who understands how curiosity underlies all science.</subfield></datafield><datafield tag="538" ind1=" " ind2=" "><subfield code="a">Mode of access: Internet via World Wide Web.</subfield></datafield><datafield tag="546" ind1=" " ind2=" "><subfield code="a">In English.</subfield></datafield><datafield tag="588" ind1="0" ind2=" "><subfield code="a">Description based on online resource; title from PDF title page (publisher's Web site, viewed 29. Jun 2022)</subfield></datafield><datafield tag="650" ind1=" " ind2="0"><subfield code="a">Atomic structure.</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">SCIENCE / Physics / General.</subfield><subfield code="2">bisacsh</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Back-Goudsmit effect.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Bohr magneton.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Bohr radius.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Clebsch-Gordan coefficient.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Dirac zeta function.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Doppler broadening.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Fermi contact interaction.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Fermi golden rule.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Gaussian lineshape.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Green's function.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Hermitian operator.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Huygen's principle.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Laplace equation.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Pauli spin matrices.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Ramsay method.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Stark effect.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">Thomas precession.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">acceleration potential.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">angular distribution function.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">annihilation operator.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">anticommutator.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">antiresonant frequency.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">basis states.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">coherence terms.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">collisional broadening.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">counter-rotating frame.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">density matrix.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">detection operator.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">diamagnetic interaction.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">efficiency matrix.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">eigenvalue problem.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">extraction potential.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">field mode density.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">fine structure constant.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">gas target.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">gyromagnetic ratio.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">helicity.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">impedance mismatch.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">interaction representation.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">level anticrossing.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">lineshape narrowing.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">occupation probabilities.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">optical signal function.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">paraxial ray equation.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">periodic table.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">polarization of the vacuum.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">power saturation curve.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">quantum interference.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">quantum numbers.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">reflection coefficient.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">resonant frequency.</subfield></datafield><datafield tag="653" ind1=" " ind2=" "><subfield code="a">selection rules.</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Title is part of eBook package:</subfield><subfield code="d">De Gruyter</subfield><subfield code="t">Princeton University Press eBook-Package Backlist 2000-2013</subfield><subfield code="z">9783110442502</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Title is part of eBook package:</subfield><subfield code="d">De Gruyter</subfield><subfield code="t">Princeton University Press eBook-Package Gap Years</subfield><subfield code="z">9783110784237</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1515/9780691228266?locatt=mode:legacy</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://www.degruyter.com/isbn/9780691228266</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="3">Cover</subfield><subfield code="u">https://www.degruyter.com/document/cover/isbn/9780691228266/original</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">978-3-11-044250-2 Princeton University Press eBook-Package Backlist 2000-2013</subfield><subfield code="c">2000</subfield><subfield code="d">2013</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">978-3-11-078423-7 Princeton University Press eBook-Package Gap Years</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_BACKALL</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_CL_MTPY</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_EBACKALL</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_EBKALL</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_ECL_MTPY</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_EEBKALL</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_ESTMALL</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_PPALL</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">EBA_STMALL</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV-deGruyter-alles</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">PDA12STME</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">PDA13ENGE</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">PDA18STMEE</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">PDA5EBK</subfield></datafield></record></collection>