Rotational bands in 238U

D. Ward; H. R. Andrews; G. C. Ball; A. Galindo-Uribarri; V. P. Janzen; T. Nakatsukasa; D. C. Radford; T. E. Drake; J. DeGraaf; S. Pilotte; Y. R. Shimizu

doi:10.1016/0375-9474(95)00490-4

Rotational bands in ²³⁸U

D. Ward, H. R. Andrews, G. C. Ball, A. Galindo-Uribarri, V. P. Janzen, T. Nakatsukasa, D. C. Radford, T. E. Drake, J. DeGraaf, S. Pilotte, Y. R. Shimizu

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

59 Scopus citations

Abstract

A thick foil of ²³⁸U was bombarded with ²⁰⁹Bi beams at 1130 and 1330 MeV, delivered by the TASCC facility at Chalk River Laboratories. Gamma-ray spectroscopy of states populated in multiple Coulomb excitation was performed with the 8π spectrometer, an instrument comprising 20 Compton-suppressed HPGe detectors and 71 BGO ball elements. The event trigger required that 3 BGO elements and 2 HPGe detectors fire in coincidence. The experiment achieved a high degree of sensitivity, the weakest rotational band observed had about 0.16% intensity of the ground state rotational band. Several bands were observed to high spin for the first time, including the γ-vibrational band (spin 27⁺) and the octupole bands with K = 0 (spin 31^-), K= 1 (spin 28^-) and K = 2 (spin 25^-). Results for positive and negative parity vibrational bands are compared with cranked RPA calculations. Although this theory can explain some features of the data, many puzzling aspects remain to be explored.

Original language	English
Pages (from-to)	88-110
Number of pages	23
Journal	Nuclear Physics A
Volume	600
Issue number	1
DOIs	https://doi.org/10.1016/0375-9474(95)00490-4
State	Published - Apr 1 1996
Externally published	Yes

Keywords

1330 MeV
Bi beam E=1130
Coulomb excitation
Deduced level scheme, γ-vibrational band, K=0, 1, 2 octupole bands
Measured E. 1, γ-γ coincidence
Natural target
U

Access to Document

10.1016/0375-9474(95)00490-4

Cite this

@article{edd2cd0a23d34445abe927af12d76333,

title = "Rotational bands in 238U",

abstract = "A thick foil of 238U was bombarded with 209Bi beams at 1130 and 1330 MeV, delivered by the TASCC facility at Chalk River Laboratories. Gamma-ray spectroscopy of states populated in multiple Coulomb excitation was performed with the 8π spectrometer, an instrument comprising 20 Compton-suppressed HPGe detectors and 71 BGO ball elements. The event trigger required that 3 BGO elements and 2 HPGe detectors fire in coincidence. The experiment achieved a high degree of sensitivity, the weakest rotational band observed had about 0.16% intensity of the ground state rotational band. Several bands were observed to high spin for the first time, including the γ-vibrational band (spin 27+) and the octupole bands with K = 0 (spin 31-), K= 1 (spin 28-) and K = 2 (spin 25-). Results for positive and negative parity vibrational bands are compared with cranked RPA calculations. Although this theory can explain some features of the data, many puzzling aspects remain to be explored.",

keywords = "1330 MeV, Bi beam E=1130, Coulomb excitation, Deduced level scheme, γ-vibrational band, K=0, 1, 2 octupole bands, Measured E. 1, γ-γ coincidence, Natural target, U",

author = "D. Ward and Andrews, {H. R.} and Ball, {G. C.} and A. Galindo-Uribarri and Janzen, {V. P.} and T. Nakatsukasa and Radford, {D. C.} and Drake, {T. E.} and J. DeGraaf and S. Pilotte and Shimizu, {Y. R.}",

year = "1996",

month = apr,

day = "1",

doi = "10.1016/0375-9474(95)00490-4",

language = "English",

volume = "600",

pages = "88--110",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier",

number = "1",

}

TY - JOUR

T1 - Rotational bands in 238U

AU - Ward, D.

AU - Andrews, H. R.

AU - Ball, G. C.

AU - Galindo-Uribarri, A.

AU - Janzen, V. P.

AU - Nakatsukasa, T.

AU - Radford, D. C.

AU - Drake, T. E.

AU - DeGraaf, J.

AU - Pilotte, S.

AU - Shimizu, Y. R.

PY - 1996/4/1

Y1 - 1996/4/1

N2 - A thick foil of 238U was bombarded with 209Bi beams at 1130 and 1330 MeV, delivered by the TASCC facility at Chalk River Laboratories. Gamma-ray spectroscopy of states populated in multiple Coulomb excitation was performed with the 8π spectrometer, an instrument comprising 20 Compton-suppressed HPGe detectors and 71 BGO ball elements. The event trigger required that 3 BGO elements and 2 HPGe detectors fire in coincidence. The experiment achieved a high degree of sensitivity, the weakest rotational band observed had about 0.16% intensity of the ground state rotational band. Several bands were observed to high spin for the first time, including the γ-vibrational band (spin 27+) and the octupole bands with K = 0 (spin 31-), K= 1 (spin 28-) and K = 2 (spin 25-). Results for positive and negative parity vibrational bands are compared with cranked RPA calculations. Although this theory can explain some features of the data, many puzzling aspects remain to be explored.

AB - A thick foil of 238U was bombarded with 209Bi beams at 1130 and 1330 MeV, delivered by the TASCC facility at Chalk River Laboratories. Gamma-ray spectroscopy of states populated in multiple Coulomb excitation was performed with the 8π spectrometer, an instrument comprising 20 Compton-suppressed HPGe detectors and 71 BGO ball elements. The event trigger required that 3 BGO elements and 2 HPGe detectors fire in coincidence. The experiment achieved a high degree of sensitivity, the weakest rotational band observed had about 0.16% intensity of the ground state rotational band. Several bands were observed to high spin for the first time, including the γ-vibrational band (spin 27+) and the octupole bands with K = 0 (spin 31-), K= 1 (spin 28-) and K = 2 (spin 25-). Results for positive and negative parity vibrational bands are compared with cranked RPA calculations. Although this theory can explain some features of the data, many puzzling aspects remain to be explored.

KW - 1330 MeV

KW - Bi beam E=1130

KW - Coulomb excitation

KW - Deduced level scheme, γ-vibrational band, K=0, 1, 2 octupole bands

KW - Measured E. 1, γ-γ coincidence

KW - Natural target

KW - U

UR - http://www.scopus.com/inward/record.url?scp=16144367468&partnerID=8YFLogxK

U2 - 10.1016/0375-9474(95)00490-4

DO - 10.1016/0375-9474(95)00490-4

M3 - Article

AN - SCOPUS:16144367468

SN - 0375-9474

VL - 600

SP - 88

EP - 110

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 1

ER -

Rotational bands in ²³⁸U

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this