Identification of the crossing point at N=21 between normal and intruder configurations

R. Licǎ; F. Rotaru; M. J G Borge; S. Grévy; F. Negoiţǎ; A. Poves; O. Sorlin; Andrei Andreyev; R. Borcea; C. Costache; H. De Witte; L. M. Fraile; P. T. Greenlees; M. Huyse; A. Ionescu; S. Kisyov; J. Konki; I. Lazarus; M. Madurga; N. Mǎrginean; R. Mǎrginean; C. Mihai; R. E. Mihai; A. Negret; R. D. Page; J. Pakarinen; S. Pascu; V. Pucknell; P. Rahkila; E. Rapisarda; A. Şerban; C. O. Sotty; L. Stan; M. Stǎnoiu; O. Tengblad; A. Turturicǎ; P. Van Duppen; R. Wadsworth; N. Warr

doi:10.1103/PhysRevC.95.021301

Identification of the crossing point at N=21 between normal and intruder configurations

R. Licǎ, F. Rotaru, M. J G Borge, S. Grévy, F. Negoiţǎ, A. Poves, O. Sorlin, Andrei Andreyev, R. Borcea, C. Costache, H. De Witte, L. M. Fraile, P. T. Greenlees, M. Huyse, A. Ionescu, S. Kisyov, J. Konki, I. Lazarus, M. Madurga, N. MǎrgineanR. Mǎrginean, C. Mihai, R. E. Mihai, A. Negret, R. D. Page, J. Pakarinen, S. Pascu, V. Pucknell, P. Rahkila, E. Rapisarda, A. Şerban, C. O. Sotty, L. Stan, M. Stǎnoiu, O. Tengblad, A. Turturicǎ, P. Van Duppen, R. Wadsworth, N. Warr

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

Abstract

The β− decay of 34Mg was used to study the 34Al
nucleus through g-ray spectroscopy at the Isotope Separator On-Line facility of CERN. Previous studies identified two β-decaying states in 34Al having spin-parity assignments Jπ=4−dominated by the normal configurationπ
(d5/2)−1⊗ν(f7/2) and Jπ=1+ by the intruder configuration π(d5/2)−1⊗ν(d3/2)−1(f7/2)2 . Their unknown ordering and relative energy have been the subject of debate for the placement of 34Al 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 T1/2=44.9(4)ms, that is twice as long as the previously measured 20(10) ms, has been determined for 34Mg. 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.

Original language	English
Article number	021301(R)
Pages (from-to)	21301
Number of pages	1
Journal	Physical Review C
Volume	95
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.95.021301
Publication status	Published - 9 Feb 2017

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PhysRevC.95.021301
© 2017, The Authors.
Final published version, 447 KBLicence: CC BY

Cite this

Licǎ, R., Rotaru, F., Borge, M. J. G., Grévy, S., Negoiţǎ, F., Poves, A., Sorlin, O., Andreyev, A., 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., ... Warr, N. (2017). Identification of the crossing point at N=21 between normal and intruder configurations. Physical Review C, 95(2), 21301. Article 021301(R). https://doi.org/10.1103/PhysRevC.95.021301

@article{917b7126f1d7490abe32ae09c5f3c339,

title = "Identification of the crossing point at N=21 between normal and intruder configurations",

abstract = "The β− decay of 34Mg was used to study the 34Al nucleus through g-ray spectroscopy at the Isotope Separator On-Line facility of CERN. Previous studies identified two β-decaying states in 34Al having spin-parity assignments Jπ=4−dominated by the normal configurationπ(d5/2)−1⊗ν(f7/2) and Jπ=1+ by the intruder configuration π(d5/2)−1⊗ν(d3/2)−1(f7/2)2 . Their unknown ordering and relative energy have been the subject of debate for the placement of 34Al 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 T1/2=44.9(4)ms, that is twice as long as the previously measured 20(10) ms, has been determined for 34Mg. 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.",

author = "R. Licǎ and F. Rotaru and Borge, {M. J G} and S. Gr{\'e}vy and F. Negoi{\c t}ǎ and A. Poves and O. Sorlin and Andrei Andreyev and R. Borcea and C. Costache and {De Witte}, H. and Fraile, {L. M.} and Greenlees, {P. T.} and M. Huyse and A. Ionescu and S. Kisyov and J. Konki and I. Lazarus and M. Madurga and N. Mǎrginean and R. Mǎrginean and C. Mihai and Mihai, {R. E.} and A. Negret and Page, {R. D.} and J. Pakarinen and S. Pascu and V. Pucknell and P. Rahkila and E. Rapisarda and A. {\c S}erban and Sotty, {C. O.} and L. Stan and M. Stǎnoiu and O. Tengblad and A. Turturicǎ and {Van Duppen}, P. and R. Wadsworth and N. Warr",

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doi = "10.1103/PhysRevC.95.021301",

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Licǎ, R, Rotaru, F, Borge, MJG, Grévy, S, Negoiţǎ, F, Poves, A, Sorlin, O, Andreyev, A, Borcea, R, Costache, C, De Witte, H, Fraile, LM, Greenlees, PT, Huyse, M, Ionescu, A, Kisyov, S, Konki, J, Lazarus, I, Madurga, M, Mǎrginean, N, Mǎrginean, R, Mihai, C, Mihai, RE, Negret, A, Page, RD, Pakarinen, J, Pascu, S, Pucknell, V, Rahkila, P, Rapisarda, E, Şerban, A, Sotty, CO, Stan, L, Stǎnoiu, M, Tengblad, O, Turturicǎ, A, Van Duppen, P, Wadsworth, R & Warr, N 2017, 'Identification of the crossing point at N=21 between normal and intruder configurations', Physical Review C, vol. 95, no. 2, 021301(R), pp. 21301. https://doi.org/10.1103/PhysRevC.95.021301

TY - JOUR

T1 - Identification of the crossing point at N=21 between normal and intruder configurations

AU - Licǎ, R.

AU - Rotaru, F.

AU - Borge, M. J G

AU - Grévy, S.

AU - Negoiţǎ, F.

AU - Poves, A.

AU - Sorlin, O.

AU - Andreyev, Andrei

AU - Borcea, R.

AU - Costache, C.

AU - De Witte, H.

AU - Fraile, L. M.

AU - Greenlees, P. T.

AU - Huyse, M.

AU - Ionescu, A.

AU - Kisyov, S.

AU - Konki, J.

AU - Lazarus, I.

AU - Madurga, M.

AU - Mǎrginean, N.

AU - Mǎrginean, R.

AU - Mihai, C.

AU - Mihai, R. E.

AU - Negret, A.

AU - Page, R. D.

AU - Pakarinen, J.

AU - Pascu, S.

AU - Pucknell, V.

AU - Rahkila, P.

AU - Rapisarda, E.

AU - Şerban, A.

AU - Sotty, C. O.

AU - Stan, L.

AU - Stǎnoiu, M.

AU - Tengblad, O.

AU - Turturicǎ, A.

AU - Van Duppen, P.

AU - Wadsworth, R.

AU - Warr, N.

PY - 2017/2/9

Y1 - 2017/2/9

N2 - The β− decay of 34Mg was used to study the 34Al nucleus through g-ray spectroscopy at the Isotope Separator On-Line facility of CERN. Previous studies identified two β-decaying states in 34Al having spin-parity assignments Jπ=4−dominated by the normal configurationπ(d5/2)−1⊗ν(f7/2) and Jπ=1+ by the intruder configuration π(d5/2)−1⊗ν(d3/2)−1(f7/2)2 . Their unknown ordering and relative energy have been the subject of debate for the placement of 34Al 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 T1/2=44.9(4)ms, that is twice as long as the previously measured 20(10) ms, has been determined for 34Mg. 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.

AB - The β− decay of 34Mg was used to study the 34Al nucleus through g-ray spectroscopy at the Isotope Separator On-Line facility of CERN. Previous studies identified two β-decaying states in 34Al having spin-parity assignments Jπ=4−dominated by the normal configurationπ(d5/2)−1⊗ν(f7/2) and Jπ=1+ by the intruder configuration π(d5/2)−1⊗ν(d3/2)−1(f7/2)2 . Their unknown ordering and relative energy have been the subject of debate for the placement of 34Al 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 T1/2=44.9(4)ms, that is twice as long as the previously measured 20(10) ms, has been determined for 34Mg. 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.

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U2 - 10.1103/PhysRevC.95.021301

DO - 10.1103/PhysRevC.95.021301

M3 - Article

AN - SCOPUS:85015661483

SN - 2469-9985

VL - 95

SP - 21301

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 021301(R)

ER -

Identification of the crossing point at N=21 between normal and intruder configurations

Abstract

Bibliographical note

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Nuclear Physics Consolidated Grant

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Identification of the crossing point at N=21 between normal and intruder configurations

Abstract

Bibliographical note

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Projects

Nuclear Physics Consolidated Grant

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