Spectroscopy of exotic 121, 123, 125Ag produced in fragmentation reactions

I. Stefanescu; W. B. Walters; P. F. Mantica; B. A. Brown; A. D. Davies; A. Estrade; P. T. Hosmer; N. Hoteling; S. N. Liddick; W. D.M. Rae; T. J. Mertzimekis; F. Montes; A. C. Morton; W. F. Mueller; M. Ouellette; E. Pellegrini; P. Santi; D. Seweryniak; H. Schatz; J. Shergur; A. Stolz; J. R. Stone; B. E. Tomlin

doi:10.1140/epja/i2008-10754-7

Spectroscopy of exotic ^{121, 123, 125}Ag produced in fragmentation reactions

I. Stefanescu, W. B. Walters, P. F. Mantica, B. A. Brown, A. D. Davies, A. Estrade, P. T. Hosmer, N. Hoteling, S. N. Liddick, W. D.M. Rae, T. J. Mertzimekis, F. Montes, A. C. Morton, W. F. Mueller, M. Ouellette, E. Pellegrini, P. Santi, D. Seweryniak, H. Schatz, J. ShergurA. Stolz, J. R. Stone, B. E. Tomlin

Physics

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Abstract

Excited states in the neutron-rich ^{121, 123, 125}Ag were studied via the fragmentation of a ¹³⁶Xe beam at 120MeV/nucleon in a thick ⁹Be target. The levels in ¹²¹Ag were populated in the β decay of ¹²¹Pd while those assigned to ^{123, 125}Ag were identified via isomer spectroscopy. The transitions identified in ¹²¹Ag are consistent with the γ-rays reported in ^{117, 119}Ag. The newly observed transitions were placed in the level schemes of ^{123, 125}Ag based on the analysis of γ-γ coincidences and the systematics. We attribute the onset of isomerism in the ^{123, 125}Ag isotopes to the drop in energy of the negative-parity levels similar to the 5^- state in the even-even Cd cores. The proposed level scheme for ¹²⁵Ag is well described by the NuShellX shell model calculations.

Original language	English
Article number	407
Pages (from-to)	407-413
Number of pages	7
Journal	European Physical Journal A
Volume	42
Issue number	3
DOIs	https://doi.org/10.1140/epja/i2008-10754-7
State	Published - Dec 2009

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Stefanescu, I., Walters, W. B., Mantica, P. F., Brown, B. A., Davies, A. D., Estrade, A., Hosmer, P. T., Hoteling, N., Liddick, S. N., Rae, W. D. M., Mertzimekis, T. J., Montes, F., Morton, A. C., Mueller, W. F., Ouellette, M., Pellegrini, E., Santi, P., Seweryniak, D., Schatz, H., ... Tomlin, B. E. (2009). Spectroscopy of exotic ^{121, 123, 125}Ag produced in fragmentation reactions. European Physical Journal A, 42(3), 407-413. Article 407. https://doi.org/10.1140/epja/i2008-10754-7

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title = "Spectroscopy of exotic 121, 123, 125Ag produced in fragmentation reactions",

abstract = "Excited states in the neutron-rich 121, 123, 125Ag were studied via the fragmentation of a 136Xe beam at 120MeV/nucleon in a thick 9Be target. The levels in 121Ag were populated in the β decay of 121Pd while those assigned to 123, 125Ag were identified via isomer spectroscopy. The transitions identified in 121Ag are consistent with the γ-rays reported in 117, 119Ag. The newly observed transitions were placed in the level schemes of 123, 125Ag based on the analysis of γ-γ coincidences and the systematics. We attribute the onset of isomerism in the 123, 125Ag isotopes to the drop in energy of the negative-parity levels similar to the 5- state in the even-even Cd cores. The proposed level scheme for 125Ag is well described by the NuShellX shell model calculations.",

author = "I. Stefanescu and Walters, {W. B.} and Mantica, {P. F.} and Brown, {B. A.} and Davies, {A. D.} and A. Estrade and Hosmer, {P. T.} and N. Hoteling and Liddick, {S. N.} and Rae, {W. D.M.} and Mertzimekis, {T. J.} and F. Montes and Morton, {A. C.} and Mueller, {W. F.} and M. Ouellette and E. Pellegrini and P. Santi and D. Seweryniak and H. Schatz and J. Shergur and A. Stolz and Stone, {J. R.} and Tomlin, {B. E.}",

year = "2009",

month = dec,

doi = "10.1140/epja/i2008-10754-7",

language = "English",

volume = "42",

pages = "407--413",

journal = "European Physical Journal A",

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Stefanescu, I, Walters, WB, Mantica, PF, Brown, BA, Davies, AD, Estrade, A, Hosmer, PT, Hoteling, N, Liddick, SN, Rae, WDM, Mertzimekis, TJ, Montes, F, Morton, AC, Mueller, WF, Ouellette, M, Pellegrini, E, Santi, P, Seweryniak, D, Schatz, H, Shergur, J, Stolz, A, Stone, JR & Tomlin, BE 2009, 'Spectroscopy of exotic ^{121, 123, 125}Ag produced in fragmentation reactions', European Physical Journal A, vol. 42, no. 3, 407, pp. 407-413. https://doi.org/10.1140/epja/i2008-10754-7

TY - JOUR

T1 - Spectroscopy of exotic 121, 123, 125Ag produced in fragmentation reactions

AU - Stefanescu, I.

AU - Walters, W. B.

AU - Mantica, P. F.

AU - Brown, B. A.

AU - Davies, A. D.

AU - Estrade, A.

AU - Hosmer, P. T.

AU - Hoteling, N.

AU - Liddick, S. N.

AU - Rae, W. D.M.

AU - Mertzimekis, T. J.

AU - Montes, F.

AU - Morton, A. C.

AU - Mueller, W. F.

AU - Ouellette, M.

AU - Pellegrini, E.

AU - Santi, P.

AU - Seweryniak, D.

AU - Schatz, H.

AU - Shergur, J.

AU - Stolz, A.

AU - Stone, J. R.

AU - Tomlin, B. E.

PY - 2009/12

Y1 - 2009/12

N2 - Excited states in the neutron-rich 121, 123, 125Ag were studied via the fragmentation of a 136Xe beam at 120MeV/nucleon in a thick 9Be target. The levels in 121Ag were populated in the β decay of 121Pd while those assigned to 123, 125Ag were identified via isomer spectroscopy. The transitions identified in 121Ag are consistent with the γ-rays reported in 117, 119Ag. The newly observed transitions were placed in the level schemes of 123, 125Ag based on the analysis of γ-γ coincidences and the systematics. We attribute the onset of isomerism in the 123, 125Ag isotopes to the drop in energy of the negative-parity levels similar to the 5- state in the even-even Cd cores. The proposed level scheme for 125Ag is well described by the NuShellX shell model calculations.

AB - Excited states in the neutron-rich 121, 123, 125Ag were studied via the fragmentation of a 136Xe beam at 120MeV/nucleon in a thick 9Be target. The levels in 121Ag were populated in the β decay of 121Pd while those assigned to 123, 125Ag were identified via isomer spectroscopy. The transitions identified in 121Ag are consistent with the γ-rays reported in 117, 119Ag. The newly observed transitions were placed in the level schemes of 123, 125Ag based on the analysis of γ-γ coincidences and the systematics. We attribute the onset of isomerism in the 123, 125Ag isotopes to the drop in energy of the negative-parity levels similar to the 5- state in the even-even Cd cores. The proposed level scheme for 125Ag is well described by the NuShellX shell model calculations.

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U2 - 10.1140/epja/i2008-10754-7

DO - 10.1140/epja/i2008-10754-7

M3 - Article

AN - SCOPUS:74149083049

SN - 1434-6001

VL - 42

SP - 407

EP - 413

JO - European Physical Journal A

JF - European Physical Journal A

IS - 3

M1 - 407

ER -

Spectroscopy of exotic ^{121, 123, 125}Ag produced in fragmentation reactions

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