Nuclear Data Sheets for A = 184

ABSTRACT:In this paper, an interacting boson model (IBM-1) has been used to calculate the low-lying positive parity yrast bands in Hf, W, and Os nuclei for N = 108 neutrons. The systematic yrast level, electric reduced transition probabilities B(E2) ↓, deformation, and quadrupole moments of those nuclei are calculated and compared with the available experimental values. The ratio of the excitation energies of first 4 + and first 2 + excited states, R 4/2 , is also studied for these nuclei. Furthermore, as a measure to quantify the evolution, we have studied systematically the

show abstract

“…The calculation of intrinsic quadrupole moments, and deformation parameter are in good agreement to the previous results [20][21][22]24 . Fig.…”

Section: Quadrupole Moments and Deformation Parametersupporting

confidence: 90%

Nuclear structure of yrast bands of 180Hf, 182W, and 184Os nuclei by means of interacting boson model-1

Hossain¹,

Kassim²,

Sharrad³

et al. 2016

ScienceAsia

View full text Add to dashboard Cite

show abstract

“…4 [4,11,29]. Evaluated nuclear data reveals a well-defined structure above the J π = 8 (+) isomer in 184 Re, which includes 446.0-keV, J π = (9 + ), and 727.9-keV, J π = (10 + ), levels feeding the 188.0-keV isomer.…”

Section: Analysis and Resultsmentioning

confidence: 91%

New transitions and feeding of theJπ=(8+)isomer inRe186
Matters
¹
,
Fotiades
²
,
Carroll
³

et al. 2015
Phys. Rev. C
7
1
10
0
View full text Add to dashboard Cite

The spallation neutron source at the Los Alamos Neutron Science Center Weapons Neutron Research facility was used to populate excited states in 186 Re via (n, 2nγ) reactions on an enriched 187 Re target. Gamma rays were detected with the the GErmanium Array for Neutron Induced Excitations spectrometer, a Compton-suppressed array of 18 HPGe detectors. Incident neutron energies were determined by the time-of-flight technique and used to obtain γ-ray excitation functions for the purpose of identifying γ rays by reaction channel. Analysis of the singles γ-ray spectrum gated on the neutron energy range 10 ≤ En ≤ 25 MeV resulted in five transitions and one level added to the 186 Re level scheme. The additions include the placement of three γ rays at 266.7, 381.2, and 647.7 keV which have been identified as feeding the 2.0 × 10 5 yr, J π = (8 + ) isomer and yield an improved value of 148.2(5) keV for the isomer energy. These transitions may have astrophysical implications related to the use of the Re/Os cosmochronometer.

show abstract

“…184 Os (energy of decay Q 2β = 1453.7(0.6) keV [13]; isotopic abundance δ = 0.02(1)% [14]; allowed decay channels: 2ε and εβ + ) and 192 Os (Q 2β = 412.4(2.9) keV [15] [17]. The energies of the excited levels and of the emitted γ quanta are in keV (relative intensities of γ quanta, rounded to percent, are given in parentheses).…”

Section: The Osmium Contains Two Potentially Double-β Active Isotopesmentioning

confidence: 99%

“…The coefficients of conversion from different atomic shells can be calculated with the BrIcc program [28] 4 . However, the excited 111.2 keV level of 184 W has quite a long half-life of 1.251 ns [17] compared to the characteristic atomic relaxation time of ∼ 10 −15 s (see e.g. [29]).…”

Section: Radioactive Contamination Of the Osmium Samplementioning

confidence: 99%

First search for double-β decay of 184Os and 192Os

et al. 2013

View full text Add to dashboard Cite

A search for double-β decay of osmium has been realized for the first time with the help of an ultra-low background HPGe γ detector at the underground Gran Sasso National Laboratories of the INFN (Italy). After 2741 h of data taking with a 173 g ultra-pure osmium sample limits on double-β processes in 184 Os have been established at the level of T 1/2 ∼ 10 14 − 10 17 yr. Possible resonant double-electron captures in 184 Os were searched for with a sensitivity T 1/2 ∼ 10 16 yr. A half-life limit T 1/2 ≥ 5.3 × 10 19 yr was set for the double-β decay of 192 Os to the first excited level of 192 Pt. The radiopurity of the osmium sample has been investigated and radionuclides 137 Cs, 185 Os and 207 Bi were detected in the sample, while activities of 40 K, 60 Co, 226 Ra and 232 Th were limited at the ≈ mBq/kg level.

show abstract

Nuclear Data Sheets for A = 184

Cited by 101 publications

References 267 publications

Nuclear structure of yrast bands of 180Hf, 182W, and 184Os nuclei by means of interacting boson model-1

Nuclear structure of yrast bands of 180Hf, 182W, and 184Os nuclei by means of interacting boson model-1

New transitions and feeding of theJπ=(8+)isomer inRe186
Matters
¹
,
Fotiades
²
,
Carroll
³

et al. 2015
Phys. Rev. C
7
1
10
0
View full text Add to dashboard Cite

First search for double-β decay of 184Os and 192Os

Contact Info

Product

Resources

About

Nuclear Data Sheets for A = 184

Cited by 101 publications

References 267 publications

Nuclear structure of yrast bands of 180Hf, 182W, and 184Os nuclei by means of interacting boson model-1

Nuclear structure of yrast bands of 180Hf, 182W, and 184Os nuclei by means of interacting boson model-1

New transitions and feeding of theJπ=(8+)isomer inRe186Matters1, Fotiades2, Carroll3 et al. 2015Phys. Rev. C71100View full textAdd to dashboardCite

First search for double-β decay of 184Os and 192Os

Contact Info

Product

Resources

About

New transitions and feeding of theJπ=(8+)isomer inRe186
Matters
¹
,
Fotiades
²
,
Carroll
³

et al. 2015
Phys. Rev. C
7
1
10
0
View full text Add to dashboard Cite