New excited states in Ge-82: possible weakening of the N=50 closed shell

T Rzaca-Urban; W Urban; John Durell; Gavin Smith; I Ahmad

New excited states in Ge-82: possible weakening of the N=50 closed shell

T Rzaca-Urban, W Urban, John Durell, Gavin Smith, I Ahmad

Research output: Contribution to journal › Article › peer-review

Abstract

Excited states in Ge-82, populated in the spontaneous fission of Cm-248, have been studied by means of prompt gamma spectroscopy, using the EUROGAM2 multidetector array. The known level at 2287 keV is assigned spin and parity 4(+). Two new excited levels in Ge-82, with spins and parities 5,6(+), are proposed at 2930 and 3228 keV. At least one of the new levels is expected to be be due to neutron excitations across the N=50 shell gap. Its low energy, as compared to heavier N=50 isotones, supports the suggestion of other works that the N=50 shell closure is weakening when approaching the expected double shell closure at Ni-78.

Original language	English
Journal	Physical Review C
Volume	76
Issue number	2
Publication status	Published - 1 Aug 2007

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title = "New excited states in Ge-82: possible weakening of the N=50 closed shell",

abstract = "Excited states in Ge-82, populated in the spontaneous fission of Cm-248, have been studied by means of prompt gamma spectroscopy, using the EUROGAM2 multidetector array. The known level at 2287 keV is assigned spin and parity 4(+). Two new excited levels in Ge-82, with spins and parities 5,6(+), are proposed at 2930 and 3228 keV. At least one of the new levels is expected to be be due to neutron excitations across the N=50 shell gap. Its low energy, as compared to heavier N=50 isotones, supports the suggestion of other works that the N=50 shell closure is weakening when approaching the expected double shell closure at Ni-78.",

author = "T Rzaca-Urban and W Urban and John Durell and Gavin Smith and I Ahmad",

note = "Times Cited: 4",

year = "2007",

month = aug,

day = "1",

language = "English",

volume = "76",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

number = "2",

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TY - JOUR

T1 - New excited states in Ge-82

T2 - possible weakening of the N=50 closed shell

AU - Rzaca-Urban, T

AU - Urban, W

AU - Durell, John

AU - Smith, Gavin

AU - Ahmad, I

N1 - Times Cited: 4

PY - 2007/8/1

Y1 - 2007/8/1

N2 - Excited states in Ge-82, populated in the spontaneous fission of Cm-248, have been studied by means of prompt gamma spectroscopy, using the EUROGAM2 multidetector array. The known level at 2287 keV is assigned spin and parity 4(+). Two new excited levels in Ge-82, with spins and parities 5,6(+), are proposed at 2930 and 3228 keV. At least one of the new levels is expected to be be due to neutron excitations across the N=50 shell gap. Its low energy, as compared to heavier N=50 isotones, supports the suggestion of other works that the N=50 shell closure is weakening when approaching the expected double shell closure at Ni-78.

AB - Excited states in Ge-82, populated in the spontaneous fission of Cm-248, have been studied by means of prompt gamma spectroscopy, using the EUROGAM2 multidetector array. The known level at 2287 keV is assigned spin and parity 4(+). Two new excited levels in Ge-82, with spins and parities 5,6(+), are proposed at 2930 and 3228 keV. At least one of the new levels is expected to be be due to neutron excitations across the N=50 shell gap. Its low energy, as compared to heavier N=50 isotones, supports the suggestion of other works that the N=50 shell closure is weakening when approaching the expected double shell closure at Ni-78.

M3 - Article

SN - 0556-2813

VL - 76

JO - Physical Review C

JF - Physical Review C

IS - 2

ER -

New excited states in Ge-82: possible weakening of the N=50 closed shell

Abstract

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