$\ensuremath{\gamma}$-ray spectroscopy of core-excited states in $^{51}\mathrm{Mn}$

$γ$ -ray spectroscopy of core-excited states in ${}^{51}{Mn}$

J. Ekman, D. Rudolph, C. Andreoiu, C. Fahlander, M. N. Mineva, M. A. Bentley, S. J. Williams, R. Charity, E. Ideguchi, W. Reviol, D. G. Sarantites, V. Tomov, R. M. Clark, M. Cromaz, P. Fallon, A. O. Macchiavelli, M. P. Carpenter, and D. Seweryniak

Phys. Rev. C 70, 014306 – Published 13 July 2004

Abstract

The level scheme of ${}^{51}{Mn}$ has been investigated using the ${}^{28}{Si} ({}^{32}S, 2 α 1 p) {}^{51}{Mn}$ fusion-evaporation reaction at $125 MeV$ beam energy. The $γ$ rays were detected in the Ge-detector array Gammasphere, which was coupled to the $4 π$ -charged-particle detector Microball and the Neutron Shell for the coincident detection of evaporated particles. Over 100 new $γ$ -ray transitions connecting some 50 excited states have been identified. Most of the states are built on particle-hole excitations across the shell gaps at particle number $N = Z = 28$ . The rich experimental data allows for a comprehensive comparison of core-excited states with results from large-scale shell-model calculations, which are known to provide excellent predictions for the lower-lying yrast and near-yrast levels in $1 f_{7 ∕ 2}$ nuclei.

Received 13 April 2004

DOI:https://doi.org/10.1103/PhysRevC.70.014306

Authors & Affiliations

J. Ekman, D. Rudolph, C. Andreoiu^*, C. Fahlander, and M. N. Mineva

Department of Physics, Lund University, S-22100 Lund, Sweden

M. A. Bentley and S. J. Williams^†

School of Chemistry and Physics, Keele University, Keele, Staffordshire, ST5 5BG, United Kingdom

R. Charity, E. Ideguchi^‡, W. Reviol, D. G. Sarantites, and V. Tomov

Chemistry Department, Washington University, St. Louis, Missouri 63130, USA

R. M. Clark, M. Cromaz, P. Fallon, and A. O. Macchiavelli

Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

M. P. Carpenter and D. Seweryniak

Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

^*Present address: Department of Physics, University of Guelph, Guelph, Ontario, Canada NIG 2W1.
^†Present address: School of Chemistry and Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom.
^‡Present address: RIKEN, Saitama 351-0198, Japan.

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Vol. 70, Iss. 1 — July 2004

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Physical Review C

covering nuclear physics

$γ$ -ray spectroscopy of core-excited states in ${}^{51}{Mn}$

J. Ekman, D. Rudolph, C. Andreoiu, C. Fahlander, M. N. Mineva, M. A. Bentley, S. J. Williams, R. Charity, E. Ideguchi, W. Reviol, D. G. Sarantites, V. Tomov, R. M. Clark, M. Cromaz, P. Fallon, A. O. Macchiavelli, M. P. Carpenter, and D. Seweryniak

Phys. Rev. C 70, 014306 – Published 13 July 2004

Abstract

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Physical Review C

covering nuclear physics

γ-ray spectroscopy of core-excited states in Mn51

J. Ekman, D. Rudolph, C. Andreoiu, C. Fahlander, M. N. Mineva, M. A. Bentley, S. J. Williams, R. Charity, E. Ideguchi, W. Reviol, D. G. Sarantites, V. Tomov, R. M. Clark, M. Cromaz, P. Fallon, A. O. Macchiavelli, M. P. Carpenter, and D. Seweryniak

Phys. Rev. C 70, 014306 – Published 13 July 2004

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$γ$ -ray spectroscopy of core-excited states in ${}^{51}{Mn}$