Phys. Rev. C 72, 054309 (2005) - Spectroscopy of $^{90}\mathrm{Nb}$ at high spin

Spectroscopy of ${}^{90}{Nb}$ at high spin

A. Chakraborty, Krishichayan, S. S. Ghugre, R. Goswami, S. Mukhopadhyay, N. S. Pattabiraman, S. Ray, A. K. Sinha, S. Sarkar, P. V. Madhusudhana Rao, U. Garg, S. K. Basu, M. B. Chaterjee, M. Saha Sarkar, L. Chaturvedi, A. Dhal, R. K. Sinha, I. M. Govil, R. K. Bhowmik, A. Jhingan, N. Madhavan, S. Muralithar, S. Nath, R. P. Singh, and P. Sugathan

Phys. Rev. C 72, 054309 – Published 16 November 2005

Abstract

Excited states of ${}^{90}{Nb}$ were investigated via prompt and delayed γ decays and the recoil-isomer tagging technique. The level scheme of ${}^{90}{Nb}$ has been extended up to $J = 19 ℏ$ and $E_{x} = 8.4$ MeV. Half-lives of the $11^{-}$ and $17 / 2^{-}$ isomeric levels in ${}^{90, 91}{Nb}$ were measured to be $0.47 \pm 0.01$ and $3.3 \pm 0.4$ μs, respectively. The results are compared with the predictions of large-basis shell model calculations. The effects of truncation of the valence model space on the calculated results are discussed.

Received 3 November 2004

DOI:https://doi.org/10.1103/PhysRevC.72.054309

©2005 American Physical Society

Authors & Affiliations

A. Chakraborty^*, Krishichayan, S. S. Ghugre, R. Goswami, S. Mukhopadhyay, N. S. Pattabiraman, S. Ray, and A. K. Sinha

UGC-DAE Consortium for Scientific Research, Kolkata Center, Sector III/LB-8, Bidhan Nagar, Kolkata 700098, India

Department of Physics, The University of Burdwan, Burdwan 713104, India

P. V. Madhusudhana Rao and U. Garg

Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA

Variable Energy Cyclotron Center, Sector-I/AF, Bidhan Nagar, Kolkata 700064, India

M. B. Chaterjee and M. Saha Sarkar

Saha Institute of Nuclear Physics, Sector-I/AF, Bidhan Nagar, Kolkata 700064, India

L. Chaturvedi, A. Dhal, and R. K. Sinha

Department of Physics, Banaras Hindu University, Varanasi 221005, India

Department of Physics, Panjab University, Chandigarh 160014, India

R. K. Bhowmik, A. Jhingan, N. Madhavan, S. Muralithar, S. Nath, R. P. Singh, and P. Sugathan

Nuclear Science Center, Aruna Asaf Ali Marg, New Delhi 110067, India

^*Present address: Department of Physics, Krishnath College, Berhampore 742101, India.

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Issue

Vol. 72, Iss. 5 — November 2005

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