Lica, R., Rotaru, F., Borge, M. J. G., Grevy, S., Negoita, F., Poves, A., Sorlin, O., Andreyev, A. N., Borcea, R., Costache, C., De Witte, H., Fraile, L. M., Greenlees, P. T., Huyse, M., Ionescu, A., Kisyov, S., Konki, J., Lazarus, I., Madurga, M., Marginean, N., Marginean, R., Mihai, C., Mihai, R. E., Negret, A., Page, R. D., Pakarinen, J., Pascu, S., Pucknell, V., Rahkila, P., Rapisarda, E., Serban, A., Sotty, C. O., Stan, L., Stanoiu, M., Tengblad, O., Turturica, A., Van Duppen, P., Wadsworth, R. and Warr, N. (2017). Identification of the crossing point at N=21 between normal and intruder configurations. Phys. Rev. C, 95 (2). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9993

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Abstract

The beta(-) decay of Mg-34 was used to study the Al-34 nucleus through. spectroscopy at the Isotope Separator On-Line facility of CERN. Previous studies identified two beta-decaying states in Al-34 having spin-parity assignments J(pi) = 4(-) dominated by the normal configuration pi(d(5/2))(-1)circle times nu(f(7/2)) and J(pi) = 1(+) by the intruder configuration pi(d(5/2))(-1) circle times nu(d(3/2))(-1) (f(7/2))(2). Their unknown ordering and relative energy have been the subject of debate for the placement of Al-34 inside or outside the N = 20 island of inversion. We report here that the 1(+) intruder lies only 46.6 keV above the 4(-) ground state. In addition, a new half-life of T-1/2 = 44.9(4) ms, that is twice as long as the previously measured 20(10) ms, has been determined for Mg-34. Large-scale shell-model calculations with the recently developed SDPF-U-MIX interaction are compared with the new data and used to interpret the mechanisms at play at the very border of the N = 20 island of inversion.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Lica, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rotaru, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Borge, M. J. G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grevy, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Negoita, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Poves, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sorlin, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Andreyev, A. N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Borcea, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Costache, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
De Witte, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fraile, L. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Greenlees, P. T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Huyse, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ionescu, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kisyov, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Konki, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lazarus, I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Madurga, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marginean, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marginean, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mihai, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mihai, R. E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Negret, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Page, R. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pakarinen, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pascu, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pucknell, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rahkila, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rapisarda, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Serban, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sotty, C. O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stan, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stanoiu, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tengblad, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Turturica, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Van Duppen, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wadsworth, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Warr, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-239896
DOI: 10.1103/PhysRevC.95.021301
Journal or Publication Title: Phys. Rev. C
Volume: 95
Number: 2
Date: 2017
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9993
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SHELL CLOSURE; MODELMultiple languages
Physics, NuclearMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/23989

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