Level structure of Rh92: Implications for the two-proton decay of Ag94m

O. L. Pechenaya; C. J. Chiara; D. G. Sarantites; W. Reviol; R. J. Charity; M. P. Carpenter; R. V.F. Janssens; T. Lauritsen; C. J. Lister; D. Seweryniak; S. Zhu; L. L. Andersson; E. K. Johansson; D. Rudolph

doi:10.1103/PhysRevC.76.011304

Level structure of Rh92: Implications for the two-proton decay of Ag94m

O. L. Pechenaya, C. J. Chiara, D. G. Sarantites, W. Reviol, R. J. Charity, M. P. Carpenter, R. V.F. Janssens, T. Lauritsen, C. J. Lister, D. Seweryniak, S. Zhu, L. L. Andersson, E. K. Johansson, D. Rudolph

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Abstract

The 21+ isomer in Ag94 has recently been reported to have a two-proton decay branch to Rh92. We have populated Rh92 through the Ca40(Ni58,αpn) reaction at 240 MeV, and have performed detailed spectroscopic measurements of the levels, finding new states and measuring angular distributions of γ rays. We find no evidence for the states reported to be populated by the two-proton decay of Ag94m. The calculated Q-value for the two-proton decay implies that this process directly feeds low-lying yrast, or near-yrast, states in Rh92, which is very difficult to reconcile with our observations. Several scenarios for the population of Rh92 are discussed, none of which appears to be satisfactory.

Original language	English
Article number	011304
Journal	Physical Review C - Nuclear Physics
Volume	76
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.76.011304
State	Published - Jul 19 2007

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Pechenaya, O. L., Chiara, C. J., Sarantites, D. G., Reviol, W., Charity, R. J., Carpenter, M. P., Janssens, R. V. F., Lauritsen, T., Lister, C. J., Seweryniak, D., Zhu, S., Andersson, L. L., Johansson, E. K., & Rudolph, D. (2007). Level structure of Rh92: Implications for the two-proton decay of Ag94m. Physical Review C - Nuclear Physics, 76(1), Article 011304. https://doi.org/10.1103/PhysRevC.76.011304

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title = "Level structure of Rh92: Implications for the two-proton decay of Ag94m",

abstract = "The 21+ isomer in Ag94 has recently been reported to have a two-proton decay branch to Rh92. We have populated Rh92 through the Ca40(Ni58,αpn) reaction at 240 MeV, and have performed detailed spectroscopic measurements of the levels, finding new states and measuring angular distributions of γ rays. We find no evidence for the states reported to be populated by the two-proton decay of Ag94m. The calculated Q-value for the two-proton decay implies that this process directly feeds low-lying yrast, or near-yrast, states in Rh92, which is very difficult to reconcile with our observations. Several scenarios for the population of Rh92 are discussed, none of which appears to be satisfactory.",

author = "Pechenaya, {O. L.} and Chiara, {C. J.} and Sarantites, {D. G.} and W. Reviol and Charity, {R. J.} and Carpenter, {M. P.} and Janssens, {R. V.F.} and T. Lauritsen and Lister, {C. J.} and D. Seweryniak and S. Zhu and Andersson, {L. L.} and Johansson, {E. K.} and D. Rudolph",

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doi = "10.1103/PhysRevC.76.011304",

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Pechenaya, OL, Chiara, CJ, Sarantites, DG, Reviol, W, Charity, RJ, Carpenter, MP, Janssens, RVF, Lauritsen, T, Lister, CJ, Seweryniak, D, Zhu, S, Andersson, LL, Johansson, EK & Rudolph, D 2007, 'Level structure of Rh92: Implications for the two-proton decay of Ag94m', Physical Review C - Nuclear Physics, vol. 76, no. 1, 011304. https://doi.org/10.1103/PhysRevC.76.011304

TY - JOUR

T1 - Level structure of Rh92

T2 - Implications for the two-proton decay of Ag94m

AU - Pechenaya, O. L.

AU - Chiara, C. J.

AU - Sarantites, D. G.

AU - Reviol, W.

AU - Charity, R. J.

AU - Carpenter, M. P.

AU - Janssens, R. V.F.

AU - Lauritsen, T.

AU - Lister, C. J.

AU - Seweryniak, D.

AU - Zhu, S.

AU - Andersson, L. L.

AU - Johansson, E. K.

AU - Rudolph, D.

PY - 2007/7/19

Y1 - 2007/7/19

N2 - The 21+ isomer in Ag94 has recently been reported to have a two-proton decay branch to Rh92. We have populated Rh92 through the Ca40(Ni58,αpn) reaction at 240 MeV, and have performed detailed spectroscopic measurements of the levels, finding new states and measuring angular distributions of γ rays. We find no evidence for the states reported to be populated by the two-proton decay of Ag94m. The calculated Q-value for the two-proton decay implies that this process directly feeds low-lying yrast, or near-yrast, states in Rh92, which is very difficult to reconcile with our observations. Several scenarios for the population of Rh92 are discussed, none of which appears to be satisfactory.

AB - The 21+ isomer in Ag94 has recently been reported to have a two-proton decay branch to Rh92. We have populated Rh92 through the Ca40(Ni58,αpn) reaction at 240 MeV, and have performed detailed spectroscopic measurements of the levels, finding new states and measuring angular distributions of γ rays. We find no evidence for the states reported to be populated by the two-proton decay of Ag94m. The calculated Q-value for the two-proton decay implies that this process directly feeds low-lying yrast, or near-yrast, states in Rh92, which is very difficult to reconcile with our observations. Several scenarios for the population of Rh92 are discussed, none of which appears to be satisfactory.

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U2 - 10.1103/PhysRevC.76.011304

DO - 10.1103/PhysRevC.76.011304

M3 - Article

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SN - 0556-2813

VL - 76

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 1

M1 - 011304

ER -

Level structure of Rh92: Implications for the two-proton decay of Ag94m

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