The new nuclei162Os and156Ta and theN=84 alpha emitting isomers

Hofmann, S.; Armbruster, P.; Berthes, G.; Gillitzer, A.; Heßberger, F. P.; Kurcewicz, W.; Münzenberg, G.; Poppensieker, K.; Schött, H. J.; Zychor, I.

doi:10.1007/bf01290115

Cited by 11 publications

(15 citation statements)

References 4 publications

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“…The Q value and half-life estimates are presented in Table II. Table I and values from the literature [5,[46][47][48][49][50][51][52]. The half-life values were calculated using the method of Rasmussen [45], assuming s-wave emission and a reduced width equal to that of 212 Po.…”

Section: Alpha-decay Q-value Estimatesmentioning

confidence: 99%

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Limits of observable proton-emitting nuclei between theN=82andZ=82shell closures

Page

2011

Phys. Rev. C

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The regular systematic behavior of Q p values is analyzed to provide a basis for estimating Q values for as yet unknown proton and α decays. These estimates are used in predicting partial half-lives for proton and α-particle emission from states in Ta, Re, Ir, and Au nuclei beyond the proton drip line. The implications of these predictions for further experimental study in this region are discussed.

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Section: Alpha-decay Q-value Estimatesmentioning

confidence: 99%

“…Panels (c) and (d) show the values for low-spin (πs 1/2 or πd 3/2 ) states in odd-Z, even-N and odd-Z, odd-N nuclei, respectively. Data are taken from Refs [5,[46][47][48][49][50][51][52]…”

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confidence: 99%

Limits of observable proton-emitting nuclei between theN=82andZ=82shell closures

Page

2011

Phys. Rev. C

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“…However, it is possible to 165,166,167 Pt are denoted by the solid symbols. Literature values for the other nuclides were taken from [10,11,21,[29][30][31][32][33][34][35][36].…”

Section: Discussionmentioning

confidence: 99%

α -spectroscopy studies of the new nuclides Pt165 and Hg170

Hilton¹,

Uusitalo²,

Sarén³

et al. 2019

Phys. Rev. C

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The new nuclides 165 Pt and 170 Hg were produced in the reactions 92 Mo(78 Kr, 5n) and 96 Ru(78 Kr, 4n) at bombarding energies of 418 MeV and 390 MeV, respectively. For 170 Hg an α-particle energy of E α = 7590(30) keV and half-life of t 1/2 = 0.08 +0.40 −0.04 ms were deduced, while for 165 Pt the corresponding values were 7272(14) keV and 0.26 +0.26 −0.09 ms. Comparison of the reduced α-decay widths with systematics indicates that both α decays are unhindered. Although combining the measured α-decay Q values with extrapolated masses suggests that both new nuclides are unbound to two-proton emission by more than 1 MeV, their α-decay half-lives are too short for this decay mode to compete. Improved data were also obtained for 166,167 Pt, produced via the 96 Ru(78 Kr, α4n) and 96 Ru(78 Kr, α3n) reactions at bombarding energies of 390 MeV and 418 MeV.

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“…Another α line with an energy of 7.78 MeV and a half-life of 0.52 ms has been assigned to the decay of an isomeric state in 156 Hf [5]. The isomeric state was populated in the β decay of the [πh 11/2 νf 7/2 ] 9 + state in 156 Ta, and, as a result, it was assigned the [νh 9/2 νf 7/2 ] 8 + configuration in analogy to lighter N = 84 isotones [14]. In the present experiment, prompt γ -ray cascades were correlated with both 156 Hf α lines.…”

Section: A the 156 Hf Nucleusmentioning

confidence: 99%

Multiparticle configurations inN=84isotones located at the proton drip line

et al. 2005

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Excited states in the proton-rich N = 84 isotones 156 72 Hf 84 , 157 73 Ta 84 , and 158 74 W 84 were observed using 102 Pd(58 Ni, xp2n) reactions at 270 MeV. γ rays were detected with the Gammasphere array of Comptonsuppressed Ge detectors coupled with the Argonne fragment mass analyzer and were assigned to individual reaction channels using the recoil-decay tagging method. Prompt γ-ray cascades were associated with the α decay of both the ground state and the 8 + isomeric state in 156 Hf, the h 11/2 state in 157 Ta, and the 8 + isomeric state in 158 W. The level schemes constructed for 156 Hf, 157 Ta, and 158 W are compared with these of lighter N = 84 isotones and are discussed within the framework of the shell model.

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The new nuclei162Os and156Ta and theN=84 alpha emitting isomers

Cited by 11 publications

References 4 publications

Limits of observable proton-emitting nuclei between theN=82andZ=82shell closures

Limits of observable proton-emitting nuclei between theN=82andZ=82shell closures

α -spectroscopy studies of the new nuclides Pt165 and Hg170

Multiparticle configurations inN=84isotones located at the proton drip line

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