Excited states and signature inversion in Cs-116

J.F. Smith; C. J. Chiara; M. P. Carpenter; C. N. Davids; M. Devlin; D. B. Fossan; S. J. Freeman; R. V. F. Janssens; D. R. LaFosse; D. G. Sarantites; D. Seweryniak; K. Starosta; R. Wadsworth; A. N. Wilson; R. Wyss

doi:10.1103/PhysRevC.74.034310

Excited states and signature inversion in Cs-116

J.F. Smith, C. J. Chiara, M. P. Carpenter, C. N. Davids, M. Devlin, D. B. Fossan, S. J. Freeman, R. V. F. Janssens, D. R. LaFosse, D. G. Sarantites, D. Seweryniak, K. Starosta, R. Wadsworth, A. N. Wilson, R. Wyss

Physics

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

Abstract

Excited states have been observed for the first time in the very neutron-deficient, odd-odd nucleus, Cs-116(55)61. The assignment to Cs-116 has been made by the detection of gamma rays in coincidence with evaporated charged particles and with evaporation residues. The observed states form a rotational band which has been assigned to the nu(h(11/2)) circle times pi(h(11/2)) configuration. Tentative spin assignments have been made on the basis of systematic comparisons with neighboring cesium isotopes. A low-spin signature inversion is observed in the band at a rotational frequency of about 0.23 MeV/h. The observed signature inversions in the odd-odd Cs116-126 isotopes have been compared with the results of extended total Routhian surface calculations, in which signature inversion arises as a consequence of quadrupole-pairing correlations and triaxial deformation. As previously shown for some of the odd-odd A similar or equal to 120 isotopes, the calculations reproduce the signature inversions reasonably well.

Original language	English
Article number	ARTN 034310
Number of pages	10
Journal	Physical Review C
Volume	74
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.74.034310
Publication status	Published - Sept 2006

Keywords

ISOTOPES
HIGH-SPIN STATES
ASSIGNMENTS
MASS REGION
ODD-ODD NUCLEI
TRIAXIALITY
BANDS

Access to Document

10.1103/PhysRevC.74.034310

Cite this

Smith, J. F., Chiara, C. J., Carpenter, M. P., Davids, C. N., Devlin, M., Fossan, D. B., Freeman, S. J., Janssens, R. V. F., LaFosse, D. R., Sarantites, D. G., Seweryniak, D., Starosta, K., Wadsworth, R., Wilson, A. N., & Wyss, R. (2006). Excited states and signature inversion in Cs-116. Physical Review C, 74(3), Article ARTN 034310. https://doi.org/10.1103/PhysRevC.74.034310

@article{9081861578af48ed9883cba17eafe27a,

title = "Excited states and signature inversion in Cs-116",

abstract = "Excited states have been observed for the first time in the very neutron-deficient, odd-odd nucleus, Cs-116(55)61. The assignment to Cs-116 has been made by the detection of gamma rays in coincidence with evaporated charged particles and with evaporation residues. The observed states form a rotational band which has been assigned to the nu(h(11/2)) circle times pi(h(11/2)) configuration. Tentative spin assignments have been made on the basis of systematic comparisons with neighboring cesium isotopes. A low-spin signature inversion is observed in the band at a rotational frequency of about 0.23 MeV/h. The observed signature inversions in the odd-odd Cs116-126 isotopes have been compared with the results of extended total Routhian surface calculations, in which signature inversion arises as a consequence of quadrupole-pairing correlations and triaxial deformation. As previously shown for some of the odd-odd A similar or equal to 120 isotopes, the calculations reproduce the signature inversions reasonably well.",

keywords = "ISOTOPES, HIGH-SPIN STATES, ASSIGNMENTS, MASS REGION, ODD-ODD NUCLEI, TRIAXIALITY, BANDS",

author = "J.F. Smith and Chiara, {C. J.} and Carpenter, {M. P.} and Davids, {C. N.} and M. Devlin and Fossan, {D. B.} and Freeman, {S. J.} and Janssens, {R. V. F.} and LaFosse, {D. R.} and Sarantites, {D. G.} and D. Seweryniak and K. Starosta and R. Wadsworth and Wilson, {A. N.} and R. Wyss",

year = "2006",

month = sep,

doi = "10.1103/PhysRevC.74.034310",

language = "English",

volume = "74",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

number = "3",

}

TY - JOUR

T1 - Excited states and signature inversion in Cs-116

AU - Smith, J.F.

AU - Chiara, C. J.

AU - Carpenter, M. P.

AU - Davids, C. N.

AU - Devlin, M.

AU - Fossan, D. B.

AU - Freeman, S. J.

AU - Janssens, R. V. F.

AU - LaFosse, D. R.

AU - Sarantites, D. G.

AU - Seweryniak, D.

AU - Starosta, K.

AU - Wadsworth, R.

AU - Wilson, A. N.

AU - Wyss, R.

PY - 2006/9

Y1 - 2006/9

N2 - Excited states have been observed for the first time in the very neutron-deficient, odd-odd nucleus, Cs-116(55)61. The assignment to Cs-116 has been made by the detection of gamma rays in coincidence with evaporated charged particles and with evaporation residues. The observed states form a rotational band which has been assigned to the nu(h(11/2)) circle times pi(h(11/2)) configuration. Tentative spin assignments have been made on the basis of systematic comparisons with neighboring cesium isotopes. A low-spin signature inversion is observed in the band at a rotational frequency of about 0.23 MeV/h. The observed signature inversions in the odd-odd Cs116-126 isotopes have been compared with the results of extended total Routhian surface calculations, in which signature inversion arises as a consequence of quadrupole-pairing correlations and triaxial deformation. As previously shown for some of the odd-odd A similar or equal to 120 isotopes, the calculations reproduce the signature inversions reasonably well.

AB - Excited states have been observed for the first time in the very neutron-deficient, odd-odd nucleus, Cs-116(55)61. The assignment to Cs-116 has been made by the detection of gamma rays in coincidence with evaporated charged particles and with evaporation residues. The observed states form a rotational band which has been assigned to the nu(h(11/2)) circle times pi(h(11/2)) configuration. Tentative spin assignments have been made on the basis of systematic comparisons with neighboring cesium isotopes. A low-spin signature inversion is observed in the band at a rotational frequency of about 0.23 MeV/h. The observed signature inversions in the odd-odd Cs116-126 isotopes have been compared with the results of extended total Routhian surface calculations, in which signature inversion arises as a consequence of quadrupole-pairing correlations and triaxial deformation. As previously shown for some of the odd-odd A similar or equal to 120 isotopes, the calculations reproduce the signature inversions reasonably well.

KW - ISOTOPES

KW - HIGH-SPIN STATES

KW - ASSIGNMENTS

KW - MASS REGION

KW - ODD-ODD NUCLEI

KW - TRIAXIALITY

KW - BANDS

U2 - 10.1103/PhysRevC.74.034310

DO - 10.1103/PhysRevC.74.034310

M3 - Article

SN - 0556-2813

VL - 74

JO - Physical Review C

JF - Physical Review C

IS - 3

M1 - ARTN 034310

ER -