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New results near 100Sn: Observation of single-neutron states in 101Sn

Seweryniak, D, Carpenter, MP, Gros, S, Hecht, AA, Hoteling, N, Janssens, RVF, Khoo, TL, Lauritsen, T, Lister, CJ, Lotay, G , Peterson, D, Robinson, AP, Walters, WB, Wang, X, Woods, PJ and Zhu, S (2009) New results near 100Sn: Observation of single-neutron states in 101Sn Acta Physica Polonica B, 40 (3). pp. 621-627.

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A search for in-beam γ-ray transitions in 101Sn, which contains only one neutron outside the 100Sn core, using a novel approach was carried out at the Argonne Tandem-Linac System. 101Sn nuclei were produced using the 46Ti(58Ni, 3n) 101Sn fusion-evaporation reaction. Beta-delayed protons with energies and decay times consistent with previous 101Sn decay studies were observed at the focal plane of the Fragment Mass Analyzer. In-beam γ rays were detected in the Gammasphere Ge-detector array and were correlated with the 101Sn β-delayed protons using the Recoil-Decay Tagging method. As a result, a γ-ray transition between the single-neutron vg7/2 and vd5/2 states situated at the Fermi surface was identified. The measured vg7/2-vd5/2 energy splitting was compared with predictions corresponding to various mean-field potentials and was used to calculate multi-neutron configurations in light Sn isotopes. Similar approach can be used to study core excitations in 101Sn and other exotic nuclei near 100Sn.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Seweryniak, D
Carpenter, MP
Gros, S
Hecht, AA
Hoteling, N
Janssens, RVF
Khoo, TL
Lauritsen, T
Lister, CJ
Peterson, D
Robinson, AP
Walters, WB
Wang, X
Woods, PJ
Zhu, S
Date : 1 March 2009
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:40
Last Modified : 25 Jan 2020 00:16

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