MEASUREMENT OF THE MEAN LIFETIMES OF LOW-SPIN STATES IN THE SUPERDEFORMED BAND IN ND-133

S A Forbes; G Bohm; R M Clark; A Dewald; R Krucken; S M Mullins; P J Nolan; P H Regan; R Wadsworth

MEASUREMENT OF THE MEAN LIFETIMES OF LOW-SPIN STATES IN THE SUPERDEFORMED BAND IN ND-133

S A Forbes, G Bohm, R M Clark, A Dewald, R Krucken, S M Mullins, P J Nolan, P H Regan, R Wadsworth

Physics

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

Abstract

The mean lifetimes of the lower spin states of the superdeformed band in Nd-133 have been measured with the coincidence recoil distance method. The reaction used to populate the band was Pd-105 (S-32, 2p2n) Nd-133 at a beam energy of 152 MeV, and the gamma-rays were detected with the POLYTESSA array. The differential decay curve method was used to analyse the data and transition quadrupole moments, Q(0), were extracted from the measured lifetimes. The results obtained from the three lowest transitions in the superdeformed band are: Q(0) = 6.3 +/- 0.9 eb (2/21+ --> 2/17+), Q(0) = 6.7 +/- 1.1 eb (2/25+ --> 2/21+) and Q(0) > 5.0 eb; (2/29+ --> 2/25+). These results are consistent with previous results for the high spin members of the band, and are compared to theoretical calculations of total routhian surfaces. The calculation of reduced transition probabilities for the transitions that feed out of the band, allows the effect of hindrance due to K-forbiddenness to be investigated.

Original language	English
Pages (from-to)	15-23
Number of pages	9
Journal	Zeitschrift fur physik a-Hadrons and nuclei
Volume	352
Issue number	1
Publication status	Published - Jun 1995

Keywords

DECAY CURVE METHOD
2ND MINIMUM
SPECTROSCOPY
DY-152
LINE

Cite this

@article{6c26445548834076bc636b7be344ab5d,

title = "MEASUREMENT OF THE MEAN LIFETIMES OF LOW-SPIN STATES IN THE SUPERDEFORMED BAND IN ND-133",

abstract = "The mean lifetimes of the lower spin states of the superdeformed band in Nd-133 have been measured with the coincidence recoil distance method. The reaction used to populate the band was Pd-105 (S-32, 2p2n) Nd-133 at a beam energy of 152 MeV, and the gamma-rays were detected with the POLYTESSA array. The differential decay curve method was used to analyse the data and transition quadrupole moments, Q(0), were extracted from the measured lifetimes. The results obtained from the three lowest transitions in the superdeformed band are: Q(0) = 6.3 +/- 0.9 eb (2/21+ --> 2/17+), Q(0) = 6.7 +/- 1.1 eb (2/25+ --> 2/21+) and Q(0) > 5.0 eb; (2/29+ --> 2/25+). These results are consistent with previous results for the high spin members of the band, and are compared to theoretical calculations of total routhian surfaces. The calculation of reduced transition probabilities for the transitions that feed out of the band, allows the effect of hindrance due to K-forbiddenness to be investigated.",

keywords = "DECAY CURVE METHOD, 2ND MINIMUM, SPECTROSCOPY, DY-152, LINE",

author = "Forbes, {S A} and G Bohm and Clark, {R M} and A Dewald and R Krucken and Mullins, {S M} and Nolan, {P J} and Regan, {P H} and R Wadsworth",

year = "1995",

month = jun,

language = "English",

volume = "352",

pages = "15--23",

journal = "Zeitschrift fur physik a-Hadrons and nuclei",

issn = "0939-7922",

publisher = "Springer",

number = "1",

}

TY - JOUR

T1 - MEASUREMENT OF THE MEAN LIFETIMES OF LOW-SPIN STATES IN THE SUPERDEFORMED BAND IN ND-133

AU - Forbes, S A

AU - Bohm, G

AU - Clark, R M

AU - Dewald, A

AU - Krucken, R

AU - Mullins, S M

AU - Nolan, P J

AU - Regan, P H

AU - Wadsworth, R

PY - 1995/6

Y1 - 1995/6

N2 - The mean lifetimes of the lower spin states of the superdeformed band in Nd-133 have been measured with the coincidence recoil distance method. The reaction used to populate the band was Pd-105 (S-32, 2p2n) Nd-133 at a beam energy of 152 MeV, and the gamma-rays were detected with the POLYTESSA array. The differential decay curve method was used to analyse the data and transition quadrupole moments, Q(0), were extracted from the measured lifetimes. The results obtained from the three lowest transitions in the superdeformed band are: Q(0) = 6.3 +/- 0.9 eb (2/21+ --> 2/17+), Q(0) = 6.7 +/- 1.1 eb (2/25+ --> 2/21+) and Q(0) > 5.0 eb; (2/29+ --> 2/25+). These results are consistent with previous results for the high spin members of the band, and are compared to theoretical calculations of total routhian surfaces. The calculation of reduced transition probabilities for the transitions that feed out of the band, allows the effect of hindrance due to K-forbiddenness to be investigated.

AB - The mean lifetimes of the lower spin states of the superdeformed band in Nd-133 have been measured with the coincidence recoil distance method. The reaction used to populate the band was Pd-105 (S-32, 2p2n) Nd-133 at a beam energy of 152 MeV, and the gamma-rays were detected with the POLYTESSA array. The differential decay curve method was used to analyse the data and transition quadrupole moments, Q(0), were extracted from the measured lifetimes. The results obtained from the three lowest transitions in the superdeformed band are: Q(0) = 6.3 +/- 0.9 eb (2/21+ --> 2/17+), Q(0) = 6.7 +/- 1.1 eb (2/25+ --> 2/21+) and Q(0) > 5.0 eb; (2/29+ --> 2/25+). These results are consistent with previous results for the high spin members of the band, and are compared to theoretical calculations of total routhian surfaces. The calculation of reduced transition probabilities for the transitions that feed out of the band, allows the effect of hindrance due to K-forbiddenness to be investigated.

KW - DECAY CURVE METHOD

KW - 2ND MINIMUM

KW - SPECTROSCOPY

KW - DY-152

KW - LINE

M3 - Article

SN - 0939-7922

VL - 352

SP - 15

EP - 23

JO - Zeitschrift fur physik a-Hadrons and nuclei

JF - Zeitschrift fur physik a-Hadrons and nuclei

IS - 1

ER -