ROTATIONAL BANDS NEAR THE Z=50 CLOSED-SHELL - SB-111(51)

D R Lafosse; D B Fossan; J R Hughes; Y Liang; H Schnare; P Vaska; M P Waring; J Y Zhang; R M Clark; R Wadsworth; S A Forbes; E S Paul; V P Janzen; A Galindouribarri; D C Radford; D Ward; S M Mullins; D Prevost; G Zwartz

ROTATIONAL BANDS NEAR THE Z=50 CLOSED-SHELL - SB-111(51)

D R Lafosse, D B Fossan, J R Hughes, Y Liang, H Schnare, P Vaska, M P Waring, J Y Zhang, R M Clark, R Wadsworth, S A Forbes, E S Paul, V P Janzen, A Galindouribarri, D C Radford, D Ward, S M Mullins, D Prevost, G Zwartz

Physics

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

Abstract

Rotational states have been identified in Sb-111(51) for the first time. Three decoupled (DELTAI=2) bands extending to over 1 MeV in rotational frequency have been observed. At the highest frequencies, the T(2) moments of inertia for these three bands are seen to decrease steadily to unexpectedly low values; this is interpreted as evidence for a novel form of band termination. One of these bands is interpreted as being based on the pih11/2 orbital coupled to a deformed [(pig9/2)-2 (X)(pig7/2)2]0+ state of the Sn-110(50) core. The interaction strength for the alignment of the pair of h11/2 neutrons has been extracted and compared with calculations. Two possible quasiparticle configurations are discussed for the other decoupled bands. Two strongly coupled (DELTAI = 1) bands have been identified and both shown to involve the [(pig9/2)-1 (X) (pig7/2)2] configuration. A large number of spherical states have also been observed, which can be explained on the basis of valence protons coupled to spherical states in the Sn-110 core.

Original language	English
Pages (from-to)	1819-1832
Number of pages	14
Journal	Physical Review C
Volume	50
Issue number	4
Publication status	Published - Oct 1994

Keywords

SHAPE COEXISTENCE
NEUTRON ALIGNMENT
INTRUDER BANDS
HIGH-SPIN
TERMINATION
STATES

Cite this

Lafosse, D. R., Fossan, D. B., Hughes, J. R., Liang, Y., Schnare, H., Vaska, P., Waring, M. P., Zhang, J. Y., Clark, R. M., Wadsworth, R., Forbes, S. A., Paul, E. S., Janzen, V. P., Galindouribarri, A., Radford, D. C., Ward, D., Mullins, S. M., Prevost, D., & Zwartz, G. (1994). ROTATIONAL BANDS NEAR THE Z=50 CLOSED-SHELL - SB-111(51). Physical Review C, 50(4), 1819-1832.

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title = "ROTATIONAL BANDS NEAR THE Z=50 CLOSED-SHELL - SB-111(51)",

abstract = "Rotational states have been identified in Sb-111(51) for the first time. Three decoupled (DELTAI=2) bands extending to over 1 MeV in rotational frequency have been observed. At the highest frequencies, the T(2) moments of inertia for these three bands are seen to decrease steadily to unexpectedly low values; this is interpreted as evidence for a novel form of band termination. One of these bands is interpreted as being based on the pih11/2 orbital coupled to a deformed [(pig9/2)-2 (X)(pig7/2)2]0+ state of the Sn-110(50) core. The interaction strength for the alignment of the pair of h11/2 neutrons has been extracted and compared with calculations. Two possible quasiparticle configurations are discussed for the other decoupled bands. Two strongly coupled (DELTAI = 1) bands have been identified and both shown to involve the [(pig9/2)-1 (X) (pig7/2)2] configuration. A large number of spherical states have also been observed, which can be explained on the basis of valence protons coupled to spherical states in the Sn-110 core.",

keywords = "SHAPE COEXISTENCE, NEUTRON ALIGNMENT, INTRUDER BANDS, HIGH-SPIN, TERMINATION, STATES",

author = "Lafosse, {D R} and Fossan, {D B} and Hughes, {J R} and Y Liang and H Schnare and P Vaska and Waring, {M P} and Zhang, {J Y} and Clark, {R M} and R Wadsworth and Forbes, {S A} and Paul, {E S} and Janzen, {V P} and A Galindouribarri and Radford, {D C} and D Ward and Mullins, {S M} and D Prevost and G Zwartz",

year = "1994",

month = oct,

language = "English",

volume = "50",

pages = "1819--1832",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "4",

}

TY - JOUR

T1 - ROTATIONAL BANDS NEAR THE Z=50 CLOSED-SHELL - SB-111(51)

AU - Lafosse, D R

AU - Fossan, D B

AU - Hughes, J R

AU - Liang, Y

AU - Schnare, H

AU - Vaska, P

AU - Waring, M P

AU - Zhang, J Y

AU - Clark, R M

AU - Wadsworth, R

AU - Forbes, S A

AU - Paul, E S

AU - Janzen, V P

AU - Galindouribarri, A

AU - Radford, D C

AU - Ward, D

AU - Mullins, S M

AU - Prevost, D

AU - Zwartz, G

PY - 1994/10

Y1 - 1994/10

N2 - Rotational states have been identified in Sb-111(51) for the first time. Three decoupled (DELTAI=2) bands extending to over 1 MeV in rotational frequency have been observed. At the highest frequencies, the T(2) moments of inertia for these three bands are seen to decrease steadily to unexpectedly low values; this is interpreted as evidence for a novel form of band termination. One of these bands is interpreted as being based on the pih11/2 orbital coupled to a deformed [(pig9/2)-2 (X)(pig7/2)2]0+ state of the Sn-110(50) core. The interaction strength for the alignment of the pair of h11/2 neutrons has been extracted and compared with calculations. Two possible quasiparticle configurations are discussed for the other decoupled bands. Two strongly coupled (DELTAI = 1) bands have been identified and both shown to involve the [(pig9/2)-1 (X) (pig7/2)2] configuration. A large number of spherical states have also been observed, which can be explained on the basis of valence protons coupled to spherical states in the Sn-110 core.

AB - Rotational states have been identified in Sb-111(51) for the first time. Three decoupled (DELTAI=2) bands extending to over 1 MeV in rotational frequency have been observed. At the highest frequencies, the T(2) moments of inertia for these three bands are seen to decrease steadily to unexpectedly low values; this is interpreted as evidence for a novel form of band termination. One of these bands is interpreted as being based on the pih11/2 orbital coupled to a deformed [(pig9/2)-2 (X)(pig7/2)2]0+ state of the Sn-110(50) core. The interaction strength for the alignment of the pair of h11/2 neutrons has been extracted and compared with calculations. Two possible quasiparticle configurations are discussed for the other decoupled bands. Two strongly coupled (DELTAI = 1) bands have been identified and both shown to involve the [(pig9/2)-1 (X) (pig7/2)2] configuration. A large number of spherical states have also been observed, which can be explained on the basis of valence protons coupled to spherical states in the Sn-110 core.

KW - SHAPE COEXISTENCE

KW - NEUTRON ALIGNMENT

KW - INTRUDER BANDS

KW - HIGH-SPIN

KW - TERMINATION

KW - STATES

M3 - Article

SN - 2469-9985

VL - 50

SP - 1819

EP - 1832

JO - Physical Review C

JF - Physical Review C

IS - 4

ER -