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Studies of isomeric states and limits of particle stability around N∼Z∼40 using fragmentation reactions

Regan, PM, Chandler, C, Pearson, CJ, Blank, B, Grzywacz, R, Lewitowicz, M, Bruce, AM, Catford, WN, Curtis, N, Czajkowski, S , Dessagne, P, Fleury, A, Gelletly, W, Giovinazzo, J, Janas, Z, Longour, C, Marchand, C, Miehe, C, Orr, NA, Page, RD, Pravikoff, MS, Reed, AT, Saint-Laurent, MG, Vincent, SM, Wadsworth, R, Warner, DD and Winfield, JS (1997) Studies of isomeric states and limits of particle stability around N∼Z∼40 using fragmentation reactions Acta Physica Polonica B, 28 (1-2). pp. 431-442.

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Fragmentation products from a 92Mo beam on a natural nickel target have been used to study structural properties of the very neutron deficient nuclei around N∼Z∼40. We present the first observation of isomeric decays in the Tz=1 systems 3674Kr, 3980 Y and 4184Nb. The isomer in 74Kr is interpreted as the hindered decay from an excited 0+ state, confirming the prediction of prolate/oblate shape coexistence in this nucleus. Transitions from states below an isomer in the N=Z nucleus 4386Tc have also been tentatively identified, making this the heaviest N=Z system for which decays from excited states have been observed. In addition, we have obtained the first conclusive evidence for the existence of the Tz = -1/2 isotopes 3977Y, 4079Zr and 4283Mo. The data for 3977Y is of particular interest in light of the reported instability in the lighter odd-Z, Tz = -1/2 systems 69Br and 73Rb.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Chandler, C
Pearson, CJ
Blank, B
Grzywacz, R
Lewitowicz, M
Bruce, AM
Catford, WN
Curtis, N
Czajkowski, S
Dessagne, P
Fleury, A
Gelletly, W
Giovinazzo, J
Janas, Z
Longour, C
Marchand, C
Miehe, C
Orr, NA
Page, RD
Pravikoff, MS
Reed, AT
Saint-Laurent, MG
Vincent, SM
Wadsworth, R
Warner, DD
Winfield, JS
Date : 1 December 1997
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:33
Last Modified : 24 Jan 2020 22:27

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