First observation of excited states in Ba-118: Possible evidence for octupole correlations in neutron-deficient barium isotopes

J F Smith; C J Chiara; D B Fossan; G J Lane; J M Sears; I Thorslund; H Amro; C N Davids; R V F Janssens; D Seweryniak; I M Hibbert; R Wadsworth; I Y Lee; A O Macchiavelli

First observation of excited states in Ba-118: Possible evidence for octupole correlations in neutron-deficient barium isotopes

J F Smith, C J Chiara, D B Fossan, G J Lane, J M Sears, I Thorslund, H Amro, C N Davids, R V F Janssens, D Seweryniak, I M Hibbert, R Wadsworth, I Y Lee, A O Macchiavelli

Physics

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

Abstract

Excited states have been observed for the first time in the very neutron-deficient Ba-118 nuclide. The groundstate band and a side band have been observed up to spins 20 and 17 (h) over bar, respectively. The bands have been assigned to Ba-118 using gamma-recoil and gamma-x ray coincidences. Excitation-energy systematics suggest that the ground state of Ba-118 is less deformed than that of Ba-120. The side band decays into the ground-state band via three transitions, which are presumed to have El character. The occurrence of El transitions and negative-parity states in the very neutron-deficient barium (Z=56) isotopes is discussed with respect to the possible onset of octupole correlations.

Original language	English
Pages (from-to)	R1037-R1041
Number of pages	5
Journal	Physical Review C
Volume	57
Issue number	3
Publication status	Published - Mar 1998

Keywords

COINCIDENCE DATA SETS
HIGH-SPIN STATES
LIGHT XENON
NUCLEI
MASS
DEFORMATION
REGION
BANDS

Cite this

Smith, J. F., Chiara, C. J., Fossan, D. B., Lane, G. J., Sears, J. M., Thorslund, I., Amro, H., Davids, C. N., Janssens, R. V. F., Seweryniak, D., Hibbert, I. M., Wadsworth, R., Lee, I. Y., & Macchiavelli, A. O. (1998). First observation of excited states in Ba-118: Possible evidence for octupole correlations in neutron-deficient barium isotopes. Physical Review C, 57(3), R1037-R1041.

@article{be2491d6ae2d49c9b3c5c37b478eccdf,

title = "First observation of excited states in Ba-118: Possible evidence for octupole correlations in neutron-deficient barium isotopes",

abstract = "Excited states have been observed for the first time in the very neutron-deficient Ba-118 nuclide. The groundstate band and a side band have been observed up to spins 20 and 17 (h) over bar, respectively. The bands have been assigned to Ba-118 using gamma-recoil and gamma-x ray coincidences. Excitation-energy systematics suggest that the ground state of Ba-118 is less deformed than that of Ba-120. The side band decays into the ground-state band via three transitions, which are presumed to have El character. The occurrence of El transitions and negative-parity states in the very neutron-deficient barium (Z=56) isotopes is discussed with respect to the possible onset of octupole correlations.",

keywords = "COINCIDENCE DATA SETS, HIGH-SPIN STATES, LIGHT XENON, NUCLEI, MASS, DEFORMATION, REGION, BANDS",

author = "Smith, {J F} and Chiara, {C J} and Fossan, {D B} and Lane, {G J} and Sears, {J M} and I Thorslund and H Amro and Davids, {C N} and Janssens, {R V F} and D Seweryniak and Hibbert, {I M} and R Wadsworth and Lee, {I Y} and Macchiavelli, {A O}",

year = "1998",

month = mar,

language = "English",

volume = "57",

pages = "R1037--R1041",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "3",

}

TY - JOUR

T1 - First observation of excited states in Ba-118: Possible evidence for octupole correlations in neutron-deficient barium isotopes

AU - Smith, J F

AU - Chiara, C J

AU - Fossan, D B

AU - Lane, G J

AU - Sears, J M

AU - Thorslund, I

AU - Amro, H

AU - Davids, C N

AU - Janssens, R V F

AU - Seweryniak, D

AU - Hibbert, I M

AU - Wadsworth, R

AU - Lee, I Y

AU - Macchiavelli, A O

PY - 1998/3

Y1 - 1998/3

N2 - Excited states have been observed for the first time in the very neutron-deficient Ba-118 nuclide. The groundstate band and a side band have been observed up to spins 20 and 17 (h) over bar, respectively. The bands have been assigned to Ba-118 using gamma-recoil and gamma-x ray coincidences. Excitation-energy systematics suggest that the ground state of Ba-118 is less deformed than that of Ba-120. The side band decays into the ground-state band via three transitions, which are presumed to have El character. The occurrence of El transitions and negative-parity states in the very neutron-deficient barium (Z=56) isotopes is discussed with respect to the possible onset of octupole correlations.

AB - Excited states have been observed for the first time in the very neutron-deficient Ba-118 nuclide. The groundstate band and a side band have been observed up to spins 20 and 17 (h) over bar, respectively. The bands have been assigned to Ba-118 using gamma-recoil and gamma-x ray coincidences. Excitation-energy systematics suggest that the ground state of Ba-118 is less deformed than that of Ba-120. The side band decays into the ground-state band via three transitions, which are presumed to have El character. The occurrence of El transitions and negative-parity states in the very neutron-deficient barium (Z=56) isotopes is discussed with respect to the possible onset of octupole correlations.

KW - COINCIDENCE DATA SETS

KW - HIGH-SPIN STATES

KW - LIGHT XENON

KW - NUCLEI

KW - MASS

KW - DEFORMATION

KW - REGION

KW - BANDS

M3 - Article

SN - 2469-9985

VL - 57

SP - R1037-R1041

JO - Physical Review C

JF - Physical Review C

IS - 3

ER -