Testing shell-model interactions at high excitation energy and low spin: Nuclear resonance fluorescence in Ge 74

S. R. Johnson; R. V.F. Janssens; U. Friman-Gayer; B. A. Brown; B. P. Crider; S. W. Finch; Krishichayan; D. R. Little; S. Mukhopadhyay; E. E. Peters; A. P.D. Ramirez; J. A. Silano; A. P. Tonchev; W. Tornow; S. W. Yates

doi:10.1103/PhysRevC.108.024315

Testing shell-model interactions at high excitation energy and low spin: Nuclear resonance fluorescence in Ge 74

S. R. Johnson
, R. V.F. Janssens
, U. Friman-Gayer
, B. A. Brown
, B. P. Crider
, S. W. Finch
, Krishichayan
, D. R. Little
, S. Mukhopadhyay
, E. E. Peters
, A. P.D. Ramirez
, J. A. Silano
, A. P. Tonchev
, W. Tornow
, S. W. Yates

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

With their complex low-spin structure, the germanium isotopes have accrued a large number of experimental data which challenge nuclear models. The structure of the Ge74 isotope is investigated here with nuclear resonance fluorescence as part of an extensive campaign of experimental tests of the shell model in the germanium isotopic chain using a number of complementary techniques. Levels were excited with 3.10-5.44 MeV photon beams provided by the High Intensity Gamma-Ray Source at TUNL. Many new levels were identified and their spins, parities, branching ratios, and associated scattering cross section values were determined. Large-scale shell-model calculations, which include jj44b and JUN45 effective interactions developed to describe nuclei in this mass region, predict the new data satisfactorily. This study extends the validation of these two interactions, which are candidates for computation of matrix elements to be used in the interpretation of neutrinoless double-β decay experiments in Ge76, into the low-spin, high excitation energy domain.

Original language	English
Article number	024315
Journal	Physical Review C
Volume	108
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.108.024315
State	Published - Aug 2023

Bibliographical note

Publisher Copyright:
© 2023 American Physical Society.

Funding

We thank A. D. Ayangeakaa, C. Iliadis, and D. R. Gribble for their comments on this paper. This work is supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Grants No. DE-FG02-97ER41041 (UNC), DE-FG02-97ER41033 (Duke) and under Contract No. DE-AC52-07NA27344 (LLNL), and by the U.S. National Science Foundation under Grants No. PHY-2209178 (UK), PHY-1848177 (CAREER) (MSState), and PHY-2110365 (FRIB, MSU).

Funders	Funder number
FRIB
National Science Foundation Arctic Social Science Program	PHY-2110365, PHY-2209178, PHY-1848177
U.S. Department of Energy EPSCoR
Office of Science Programs
Institute for Nuclear Physics	DE-FG02-97ER41041
Lawrence Livermore National Laboratory
University of North Carolina and North Carolina State University	DE-FG02-97ER41033, DE-AC52-07NA27344
Midwestern State University

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1103/PhysRevC.108.024315

Cite this

Johnson, S. R., Janssens, R. V. F., Friman-Gayer, U., Brown, B. A., Crider, B. P., Finch, S. W., Krishichayan, Little, D. R., Mukhopadhyay, S., Peters, E. E., Ramirez, A. P. D., Silano, J. A., Tonchev, A. P., Tornow, W., & Yates, S. W. (2023). Testing shell-model interactions at high excitation energy and low spin: Nuclear resonance fluorescence in Ge 74. Physical Review C, 108(2), Article 024315. https://doi.org/10.1103/PhysRevC.108.024315

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title = "Testing shell-model interactions at high excitation energy and low spin: Nuclear resonance fluorescence in Ge 74",

abstract = "With their complex low-spin structure, the germanium isotopes have accrued a large number of experimental data which challenge nuclear models. The structure of the Ge74 isotope is investigated here with nuclear resonance fluorescence as part of an extensive campaign of experimental tests of the shell model in the germanium isotopic chain using a number of complementary techniques. Levels were excited with 3.10-5.44 MeV photon beams provided by the High Intensity Gamma-Ray Source at TUNL. Many new levels were identified and their spins, parities, branching ratios, and associated scattering cross section values were determined. Large-scale shell-model calculations, which include jj44b and JUN45 effective interactions developed to describe nuclei in this mass region, predict the new data satisfactorily. This study extends the validation of these two interactions, which are candidates for computation of matrix elements to be used in the interpretation of neutrinoless double-β decay experiments in Ge76, into the low-spin, high excitation energy domain.",

author = "Johnson, \{S. R.\} and Janssens, \{R. V.F.\} and U. Friman-Gayer and Brown, \{B. A.\} and Crider, \{B. P.\} and Finch, \{S. W.\} and Krishichayan and Little, \{D. R.\} and S. Mukhopadhyay and Peters, \{E. E.\} and Ramirez, \{A. P.D.\} and Silano, \{J. A.\} and Tonchev, \{A. P.\} and W. Tornow and Yates, \{S. W.\}",

note = "Publisher Copyright: {\textcopyright} 2023 American Physical Society.",

year = "2023",

month = aug,

doi = "10.1103/PhysRevC.108.024315",

language = "English",

volume = "108",

number = "2",

}

Johnson, SR, Janssens, RVF, Friman-Gayer, U, Brown, BA, Crider, BP, Finch, SW, Krishichayan, Little, DR, Mukhopadhyay, S, Peters, EE, Ramirez, APD, Silano, JA, Tonchev, AP, Tornow, W & Yates, SW 2023, 'Testing shell-model interactions at high excitation energy and low spin: Nuclear resonance fluorescence in Ge 74', Physical Review C, vol. 108, no. 2, 024315. https://doi.org/10.1103/PhysRevC.108.024315

TY - JOUR

T1 - Testing shell-model interactions at high excitation energy and low spin

T2 - Nuclear resonance fluorescence in Ge 74

AU - Johnson, S. R.

AU - Janssens, R. V.F.

AU - Friman-Gayer, U.

AU - Brown, B. A.

AU - Crider, B. P.

AU - Finch, S. W.

AU - Krishichayan,

AU - Little, D. R.

AU - Mukhopadhyay, S.

AU - Peters, E. E.

AU - Ramirez, A. P.D.

AU - Silano, J. A.

AU - Tonchev, A. P.

AU - Tornow, W.

AU - Yates, S. W.

PY - 2023/8

Y1 - 2023/8

N2 - With their complex low-spin structure, the germanium isotopes have accrued a large number of experimental data which challenge nuclear models. The structure of the Ge74 isotope is investigated here with nuclear resonance fluorescence as part of an extensive campaign of experimental tests of the shell model in the germanium isotopic chain using a number of complementary techniques. Levels were excited with 3.10-5.44 MeV photon beams provided by the High Intensity Gamma-Ray Source at TUNL. Many new levels were identified and their spins, parities, branching ratios, and associated scattering cross section values were determined. Large-scale shell-model calculations, which include jj44b and JUN45 effective interactions developed to describe nuclei in this mass region, predict the new data satisfactorily. This study extends the validation of these two interactions, which are candidates for computation of matrix elements to be used in the interpretation of neutrinoless double-β decay experiments in Ge76, into the low-spin, high excitation energy domain.

AB - With their complex low-spin structure, the germanium isotopes have accrued a large number of experimental data which challenge nuclear models. The structure of the Ge74 isotope is investigated here with nuclear resonance fluorescence as part of an extensive campaign of experimental tests of the shell model in the germanium isotopic chain using a number of complementary techniques. Levels were excited with 3.10-5.44 MeV photon beams provided by the High Intensity Gamma-Ray Source at TUNL. Many new levels were identified and their spins, parities, branching ratios, and associated scattering cross section values were determined. Large-scale shell-model calculations, which include jj44b and JUN45 effective interactions developed to describe nuclei in this mass region, predict the new data satisfactorily. This study extends the validation of these two interactions, which are candidates for computation of matrix elements to be used in the interpretation of neutrinoless double-β decay experiments in Ge76, into the low-spin, high excitation energy domain.

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Testing shell-model interactions at high excitation energy and low spin: Nuclear resonance fluorescence in Ge 74

Abstract

Bibliographical note

Funding

ASJC Scopus subject areas

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