Universität zu Köln

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:	Creators Email ORCID ORCID Put Code Lica, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rotaru, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Borge, M. J. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grevy, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Negoita, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Poves, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sorlin, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Andreyev, A. N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Borcea, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Costache, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED De Witte, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fraile, L. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Greenlees, P. T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Huyse, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ionescu, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kisyov, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Konki, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lazarus, I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Madurga, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Marginean, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Marginean, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mihai, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mihai, R. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Negret, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Page, R. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pakarinen, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pascu, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pucknell, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rahkila, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rapisarda, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Serban, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sotty, C. O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stan, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stanoiu, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tengblad, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Turturica, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Van Duppen, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wadsworth, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Warr, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED
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:	Keywords Language SHELL CLOSURE; MODEL Multiple languages Physics, Nuclear Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23989