Spectroscopy of ${}^{135}$La

Spectroscopy of $^{135}$ La

R. Leguillon, H. Nishibata, Y. Ito, C. M. Petrache, A. Odahara, T. Shimoda, N. Hamatani, K. Tajiri, J. Takatsu, R. Yokoyama, E. Ideguchi, H. Watanabe, Y. Wakabayashi, K. Yoshinaga, T. Suzuki, S. Nishimura, D. Beaumel, G. Lehaut, D. Guinet, P. Desesquelles, D. Curien, A. Astier, T. Konstantinopoulos, and T. Zerrouki

Phys. Rev. C 88, 044309 – Published 8 October 2013

Abstract

The $^{135}$ La nucleus has been studied using the fusion-evaporation reaction $^{124}$ Sn( $^{17}$ N, $6 n$ ) induced by the $^{17}$ N radioactive beam. The level scheme has been constructed from the $γ - γ$ coincidence measurement with an array of 12 HPGe detectors, and the lifetimes of two previously known isomeric states has been deduced. The transitions and their intensities observed in the current work as well as the level scheme derived from them is in agreement with the results of a recently published work. However, our interpretation of the results differs significantly in terms of spin and parity assignments, thus solving various contradictions concerning the configurations of some of the bands discussed in the aforementioned work.

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Received 13 June 2013

DOI:https://doi.org/10.1103/PhysRevC.88.044309

Authors & Affiliations

R. Leguillon^1,2, H. Nishibata³, Y. Ito³, C. M. Petrache^1,2, A. Odahara³, T. Shimoda³, N. Hamatani³, K. Tajiri³, J. Takatsu³, R. Yokoyama³, E. Ideguchi⁴, H. Watanabe⁵, Y. Wakabayashi^5,6, K. Yoshinaga⁷, T. Suzuki⁸, S. Nishimura⁵, D. Beaumel², G. Lehaut⁹, D. Guinet⁹, P. Desesquelles¹, D. Curien¹⁰, A. Astier¹, T. Konstantinopoulos¹, and T. Zerrouki¹

¹Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, Université Paris-Sud and CNRS/IN2P3, 91405 Orsay, France
²Institut de Physique Nucléaire, CNRS/IN2P3, 91405 Orsay, France
³Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
⁴Center for Nuclear Study (CNS), University of Tokyo, Wako, Saitama 351-0198, Japan
⁵RIKEN, Wako, Saitama 351-0198, Tokyo, Japan
⁶Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki 319-1195, Japan
⁷Tokyo University of Science, Yamazaki, Noda, Chiba 278-8510, Japan
⁸Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan
⁹IPNL CNRS/IN2P3 and Université Lyon 1, 69622 Villeurbanne, France
¹⁰IPHC/DRS, Université de Strasbourg, 67037 Strasbourg, France

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Issue

Vol. 88, Iss. 4 — October 2013

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