Enhanced ${0}_{\mathrm{g}.\mathrm{s}.}^{+}\ensuremath{\rightarrow}{2}_{1}^{+}$ $E2$ transition strength in $^{112}\mathrm{Sn}$

Enhanced $0_{g . s .}^{+} \to 2_{1}^{+}$ $E 2$ transition strength in ${}^{112}{Sn}$

R. Kumar, P. Doornenbal, A. Jhingan, R. K. Bhowmik, S. Muralithar, S. Appannababu, R. Garg, J. Gerl, M. Górska, J. Kaur, I. Kojouharov, S. Mandal, S. Mukherjee, D. Siwal, A. Sharma, Pushpendra P. Singh, R. P. Singh, and H. -J. Wollersheim

Phys. Rev. C 81, 024306 – Published 8 February 2010

Abstract

Two consecutive Coulomb excitation experiments were performed to excite the $2_{1}^{+}$ states of ${}^{112, 116}{Sn}$ using a ${}^{58}{Ni}$ beam. For ${}^{112}{Sn}$ a $B (E 2 ↑)$ value of 0.242(8) $e^{2} b^{2}$ has been determined relative to the known value of ${}^{116}{Sn}$ . The present value is more precise than previous measurements and shows a clear discrepancy from the expected parabolic dependence between the doubly magic nuclei ${}^{100}{Sn}$ and ${}^{132}{Sn}$ . It implies that the reduced transition probabilities are not symmetric with respect to the midshell mass $A = 116$ .

Received 11 September 2009

DOI:https://doi.org/10.1103/PhysRevC.81.024306

Authors & Affiliations

R. Kumar^1,*, P. Doornenbal², A. Jhingan¹, R. K. Bhowmik¹, S. Muralithar¹, S. Appannababu³, R. Garg⁴, J. Gerl⁵, M. Górska⁵, J. Kaur⁶, I. Kojouharov⁵, S. Mandal⁴, S. Mukherjee³, D. Siwal⁴, A. Sharma⁷, Pushpendra P. Singh⁸, R. P. Singh¹, and H. -J. Wollersheim⁵

¹Inter-University Accelerator Centre, New Delhi 110067, India
²RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
³Department of Physics, M.S. University of Baroda, Vadodara 390002, India
⁴Department of Physics & Astrophysics, University of Delhi, Delhi 110007, India
⁵Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
⁶Department of Physics, Panjab University, Chandigarh 160014, India
⁷Department of Physics, Bareilly College, Bareilly 243005, India
⁸INFN-Laboratori Nazionali di Legnaro (LNL), I-35020 Legnaro (PD), Italy

^*rakuiuac@gmail.com

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Vol. 81, Iss. 2 — February 2010

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Physical Review C

covering nuclear physics

Enhanced $0_{g . s .}^{+} \to 2_{1}^{+}$ $E 2$ transition strength in ${}^{112}{Sn}$

R. Kumar, P. Doornenbal, A. Jhingan, R. K. Bhowmik, S. Muralithar, S. Appannababu, R. Garg, J. Gerl, M. Górska, J. Kaur, I. Kojouharov, S. Mandal, S. Mukherjee, D. Siwal, A. Sharma, Pushpendra P. Singh, R. P. Singh, and H. -J. Wollersheim

Phys. Rev. C 81, 024306 – Published 8 February 2010

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Physical Review C

covering nuclear physics

Enhanced 0g.s.+→21+ E2 transition strength in Sn112

R. Kumar, P. Doornenbal, A. Jhingan, R. K. Bhowmik, S. Muralithar, S. Appannababu, R. Garg, J. Gerl, M. Górska, J. Kaur, I. Kojouharov, S. Mandal, S. Mukherjee, D. Siwal, A. Sharma, Pushpendra P. Singh, R. P. Singh, and H. -J. Wollersheim

Phys. Rev. C 81, 024306 – Published 8 February 2010

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Enhanced $0_{g . s .}^{+} \to 2_{1}^{+}$ $E 2$ transition strength in ${}^{112}{Sn}$