2(1)(+)-> 0(1)(+) transition strengths in Sn nuclei

J. N. Orce, S. N. Choudry, B. Crider, E. Elhami, S. Mukhopadhyay, M. Scheck, M. T. McEllistrem, S. W. Yates

Research output: Contribution to journalArticle

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Abstract

The lifetime of the 2+1 state at 1256.7 keV in 112Sn has been determined using the (n,n′γ) reaction. Angular distribution measurements were carried out at a neutron energy of 1.7 MeV, above the 2+1 energy threshold and below that of the second excited level. Through the Doppler-shift attenuation method, the lifetime of the 2+1state is determined as 750+125−90fs, which gives a B(E2;2+1→0+1) value of 10.9+1.5−1.6W.u. This E2strength in 112Snalso allows a redetermination of the B(E2;2+1→0+1) in 108Sn as 10.8(3.0) W.u. These values result in a symmetric trend around the neutron midshell in the systematics of E2 strengths in the even-mass tin isotopes and do not support N=64 or N=66 subshell gaps. The symmetric trend is in agreement with recent shell model predictions, where proton-core excitations were allowed in the calculations.
Original languageEnglish
Article number021302(R)
JournalPhysical Review C
Volume76
Issue number2
DOIs
Publication statusPublished - Aug 2007
Externally publishedYes

Cite this

Orce, J. N., Choudry, S. N., Crider, B., Elhami, E., Mukhopadhyay, S., Scheck, M., ... Yates, S. W. (2007). 2(1)(+)-> 0(1)(+) transition strengths in Sn nuclei. Physical Review C, 76(2), [021302(R)]. https://doi.org/10.1103/PhysRevC.76.021302
Orce, J. N. ; Choudry, S. N. ; Crider, B. ; Elhami, E. ; Mukhopadhyay, S. ; Scheck, M. ; McEllistrem, M. T. ; Yates, S. W. / 2(1)(+)-> 0(1)(+) transition strengths in Sn nuclei. In: Physical Review C. 2007 ; Vol. 76, No. 2.
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title = "2(1)(+)-> 0(1)(+) transition strengths in Sn nuclei",
abstract = "The lifetime of the 2+1 state at 1256.7 keV in 112Sn has been determined using the (n,n′γ) reaction. Angular distribution measurements were carried out at a neutron energy of 1.7 MeV, above the 2+1 energy threshold and below that of the second excited level. Through the Doppler-shift attenuation method, the lifetime of the 2+1state is determined as 750+125−90fs, which gives a B(E2;2+1→0+1) value of 10.9+1.5−1.6W.u. This E2strength in 112Snalso allows a redetermination of the B(E2;2+1→0+1) in 108Sn as 10.8(3.0) W.u. These values result in a symmetric trend around the neutron midshell in the systematics of E2 strengths in the even-mass tin isotopes and do not support N=64 or N=66 subshell gaps. The symmetric trend is in agreement with recent shell model predictions, where proton-core excitations were allowed in the calculations.",
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Orce, JN, Choudry, SN, Crider, B, Elhami, E, Mukhopadhyay, S, Scheck, M, McEllistrem, MT & Yates, SW 2007, '2(1)(+)-> 0(1)(+) transition strengths in Sn nuclei', Physical Review C, vol. 76, no. 2, 021302(R). https://doi.org/10.1103/PhysRevC.76.021302

2(1)(+)-> 0(1)(+) transition strengths in Sn nuclei. / Orce, J. N.; Choudry, S. N.; Crider, B.; Elhami, E.; Mukhopadhyay, S.; Scheck, M.; McEllistrem, M. T.; Yates, S. W.

In: Physical Review C, Vol. 76, No. 2, 021302(R), 08.2007.

Research output: Contribution to journalArticle

TY - JOUR

T1 - 2(1)(+)-> 0(1)(+) transition strengths in Sn nuclei

AU - Orce, J. N.

AU - Choudry, S. N.

AU - Crider, B.

AU - Elhami, E.

AU - Mukhopadhyay, S.

AU - Scheck, M.

AU - McEllistrem, M. T.

AU - Yates, S. W.

PY - 2007/8

Y1 - 2007/8

N2 - The lifetime of the 2+1 state at 1256.7 keV in 112Sn has been determined using the (n,n′γ) reaction. Angular distribution measurements were carried out at a neutron energy of 1.7 MeV, above the 2+1 energy threshold and below that of the second excited level. Through the Doppler-shift attenuation method, the lifetime of the 2+1state is determined as 750+125−90fs, which gives a B(E2;2+1→0+1) value of 10.9+1.5−1.6W.u. This E2strength in 112Snalso allows a redetermination of the B(E2;2+1→0+1) in 108Sn as 10.8(3.0) W.u. These values result in a symmetric trend around the neutron midshell in the systematics of E2 strengths in the even-mass tin isotopes and do not support N=64 or N=66 subshell gaps. The symmetric trend is in agreement with recent shell model predictions, where proton-core excitations were allowed in the calculations.

AB - The lifetime of the 2+1 state at 1256.7 keV in 112Sn has been determined using the (n,n′γ) reaction. Angular distribution measurements were carried out at a neutron energy of 1.7 MeV, above the 2+1 energy threshold and below that of the second excited level. Through the Doppler-shift attenuation method, the lifetime of the 2+1state is determined as 750+125−90fs, which gives a B(E2;2+1→0+1) value of 10.9+1.5−1.6W.u. This E2strength in 112Snalso allows a redetermination of the B(E2;2+1→0+1) in 108Sn as 10.8(3.0) W.u. These values result in a symmetric trend around the neutron midshell in the systematics of E2 strengths in the even-mass tin isotopes and do not support N=64 or N=66 subshell gaps. The symmetric trend is in agreement with recent shell model predictions, where proton-core excitations were allowed in the calculations.

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Orce JN, Choudry SN, Crider B, Elhami E, Mukhopadhyay S, Scheck M et al. 2(1)(+)-> 0(1)(+) transition strengths in Sn nuclei. Physical Review C. 2007 Aug;76(2). 021302(R). https://doi.org/10.1103/PhysRevC.76.021302