ELECTROMAGNETIC PROPERTIES OF N = 75 ISOTONES - EVIDENCE FOR TRIAXIALITY AT LOW-SPIN

E S Paul; R Ma; C W Beausang; S A Forbes; D B Fossan; J Gizon; J R Hughes; Y Liang; S M Mullins; P J Nolan; W F Piel; R J Poynter; P H Regan; R Wadsworth; N Xu

ELECTROMAGNETIC PROPERTIES OF N = 75 ISOTONES - EVIDENCE FOR TRIAXIALITY AT LOW-SPIN

E S Paul, R Ma, C W Beausang, S A Forbes, D B Fossan, J Gizon, J R Hughes, Y Liang, S M Mullins, P J Nolan, W F Piel, R J Poynter, P H Regan, R Wadsworth, N Xu

Physics

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

Abstract

Electromagnetic properties of the negative-parity yrast bands of the N = 75 isotones ranging from barium to gadolinium (56 less-than-or-equal-to Z less-than-or-equal-to 64) are summarized. Experimental E2/M1 multipole mixing ratios for inband DELTA-I = 1 transitions have been extracted up through the first band crossing, allowing the evaluation of B(M1; I --> I - 1)/B(E2; I --> I - 1), B(M1; I --> I - 1)/B(E2; I --> I - 2) and B(E2; I --> I - 1)/B(E2; I --> I - 2) ratios of reduced transition probabilities for both the nu-h11/2 and nu-h11/2 x [pi-h11/2]2 configurations. The results obtained at low spin provide evidence for triaxial nuclear shapes, while at higher spin the data are consistent with axially symmetric shapes.

Original language	English
Pages (from-to)	605-617
Number of pages	13
Journal	Journal of physics g-Nuclear and particle physics
Volume	17
Issue number	5
Publication status	Published - May 1991

Keywords

NUCLEI
QUASIPARTICLE
SIGNATURE
INTRUDER
RATES
SHAPE
BANDS
M1

Cite this

@article{34a4b769748249b99b46c916dbd36a3f,

title = "ELECTROMAGNETIC PROPERTIES OF N = 75 ISOTONES - EVIDENCE FOR TRIAXIALITY AT LOW-SPIN",

abstract = "Electromagnetic properties of the negative-parity yrast bands of the N = 75 isotones ranging from barium to gadolinium (56 less-than-or-equal-to Z less-than-or-equal-to 64) are summarized. Experimental E2/M1 multipole mixing ratios for inband DELTA-I = 1 transitions have been extracted up through the first band crossing, allowing the evaluation of B(M1; I --> I - 1)/B(E2; I --> I - 1), B(M1; I --> I - 1)/B(E2; I --> I - 2) and B(E2; I --> I - 1)/B(E2; I --> I - 2) ratios of reduced transition probabilities for both the nu-h11/2 and nu-h11/2 x [pi-h11/2]2 configurations. The results obtained at low spin provide evidence for triaxial nuclear shapes, while at higher spin the data are consistent with axially symmetric shapes.",

keywords = "NUCLEI, QUASIPARTICLE, SIGNATURE, INTRUDER, RATES, SHAPE, BANDS, M1",

author = "Paul, {E S} and R Ma and Beausang, {C W} and Forbes, {S A} and Fossan, {D B} and J Gizon and Hughes, {J R} and Y Liang and Mullins, {S M} and Nolan, {P J} and Piel, {W F} and Poynter, {R J} and Regan, {P H} and R Wadsworth and N Xu",

year = "1991",

month = may,

language = "English",

volume = "17",

pages = "605--617",

journal = "Journal of physics g-Nuclear and particle physics",

issn = "0954-3899",

publisher = "IOP Publishing",

number = "5",

}

TY - JOUR

T1 - ELECTROMAGNETIC PROPERTIES OF N = 75 ISOTONES - EVIDENCE FOR TRIAXIALITY AT LOW-SPIN

AU - Paul, E S

AU - Ma, R

AU - Beausang, C W

AU - Forbes, S A

AU - Fossan, D B

AU - Gizon, J

AU - Hughes, J R

AU - Liang, Y

AU - Mullins, S M

AU - Nolan, P J

AU - Piel, W F

AU - Poynter, R J

AU - Regan, P H

AU - Wadsworth, R

AU - Xu, N

PY - 1991/5

Y1 - 1991/5

N2 - Electromagnetic properties of the negative-parity yrast bands of the N = 75 isotones ranging from barium to gadolinium (56 less-than-or-equal-to Z less-than-or-equal-to 64) are summarized. Experimental E2/M1 multipole mixing ratios for inband DELTA-I = 1 transitions have been extracted up through the first band crossing, allowing the evaluation of B(M1; I --> I - 1)/B(E2; I --> I - 1), B(M1; I --> I - 1)/B(E2; I --> I - 2) and B(E2; I --> I - 1)/B(E2; I --> I - 2) ratios of reduced transition probabilities for both the nu-h11/2 and nu-h11/2 x [pi-h11/2]2 configurations. The results obtained at low spin provide evidence for triaxial nuclear shapes, while at higher spin the data are consistent with axially symmetric shapes.

AB - Electromagnetic properties of the negative-parity yrast bands of the N = 75 isotones ranging from barium to gadolinium (56 less-than-or-equal-to Z less-than-or-equal-to 64) are summarized. Experimental E2/M1 multipole mixing ratios for inband DELTA-I = 1 transitions have been extracted up through the first band crossing, allowing the evaluation of B(M1; I --> I - 1)/B(E2; I --> I - 1), B(M1; I --> I - 1)/B(E2; I --> I - 2) and B(E2; I --> I - 1)/B(E2; I --> I - 2) ratios of reduced transition probabilities for both the nu-h11/2 and nu-h11/2 x [pi-h11/2]2 configurations. The results obtained at low spin provide evidence for triaxial nuclear shapes, while at higher spin the data are consistent with axially symmetric shapes.

KW - NUCLEI

KW - QUASIPARTICLE

KW - SIGNATURE

KW - INTRUDER

KW - RATES

KW - SHAPE

KW - BANDS

KW - M1

M3 - Article

SN - 0954-3899

VL - 17

SP - 605

EP - 617

JO - Journal of physics g-Nuclear and particle physics

JF - Journal of physics g-Nuclear and particle physics

IS - 5

ER -