Ground-State Band of the Neutron-Rich Transuranium Nucleus<sup>250</sup>Cm<sub>154</sub>

Ishii, T.; Shigematsu, S.; Makii, H.; Asai, Mitsuteru; Toyoshima, Atsushi; Matsuda, M.; Makishima, Akio; Shizuma, T.; Kaneko, J.; Hossain, I.; Toume, H.; Ohara, Masako; Ichikawa, Shinichi; Kohno, Toshiyuki; Ogawa, Masahiro

doi:10.1143/jpsj.75.043201

Cited by 20 publications

(27 citation statements)

References 18 publications

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“…In the present work, we employed an in-beam γ -ray spectroscopic method to investigate higher spin states of 187 W populated in an 18 O-induced one-neutron transfer reaction. This type of experimental technique is effective for the investigation of near-yrast structure in moderately neutron rich nuclei [8][9][10][11][12][13].…”

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confidence: 99%

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One-quasiparticle bands in neutron-richW187

et al. 2008

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Modest spin states in neutron-rich 187 W have been populated by using a 186 W( 18 O, 17 O) one-neutron transfer reaction. Negative-parity bands previously known are extended to higher spin, and two positive-parity bands are newly identified. Configurations based on ν i 13/2 orbitals are assigned to these bands from an analysis of the level energy systematics as well as the g factors derived from in-band branching ratios.

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confidence: 99%

“…1 Figure 3 shows a level scheme for 187 W deduced from the present experimental data. The spin and parity assignments of the levels are based on γ -ray feeding pattern as well as γ -ray anisotropy [8,9] with respect to the reaction plane. Table I from γ -γ coincidence data.…”

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confidence: 99%

One-quasiparticle bands in neutron-richW187

et al. 2008

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“…Finally, we have studied the N = 154 nucleus 250 Cm and extended the ground state band, observed earlier to J π =12 + [13], to J π =24 + [7]. This is the first even-even nucleus beyond the N = 152 shell gap that is studied to high angular momenta.…”

Section: N > 152 Nucleimentioning

confidence: 79%

Towards Superheavies: Spectroscopy of 94 < Z < 98, 150 < N < 154 Nuclei

et al. 2016

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Abstract. The heaviest nuclei where excitations above the ground state can be studied lie near Z ∼ 100. These nuclear structure studies are important testing grounds for theoretical models that aim to describe superheavy nuclei. To study the highest neutron orbitals (150 ≤ N ≤ 154), we have populated high angular momentum states in a series of Pu (Z = 94), Cm (Z = 96) and Cf (Z = 98) nuclei, via inelastic and transfer reactions, with heavy beams on long-lived radioactive actinide targets. Multiple collective excitation modes and structures were identified, and their configurations deduced. Quasiparticle alignments are mapped, with odd-A band structures helping identify specific orbital contributions via blocking arguments. Higher-order multipole shapes are observed to play a significant role in disentangling competing neutron and proton alignments. The N > 152 data provide new perspectives on physics beyond the N = 152 sub-shell gap.

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“…The experimental levels are taken mostly from the recent version of the Nuclear Data Sheets, while some of recent experimental data are also employed, e.g., ref. [9].…”

Section: Srm Analysis Of Low-lying Collective Levels Of Even-even Actmentioning

confidence: 99%

“…Such a systematics can be used to estimate the low-lying collective levels of nuclei for which they are not known or only partially known. We have used the systematics of the parameters obtained and compared the SRM results with experimental data [9] for 250 Cm in figure 3. We notice that not only the experimentally known G.S.…”

Section: Srm Analysis Of Low-lying Collective Levels Of Even-even Actmentioning

confidence: 99%

Systematics and uncertainties of Hamiltonian parameters of soft-rotator model for actinides and their implications for nuclear data calculations

Chiba

Koura

Maruyama

et al. 2007

Nd2007

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Abstract. The collective low-lying levels of even-even actinides are analyzed in terms of the soft-rotator model (SRM), and best fit parameters of SRM Hamiltonian are deduced for 19 nuclides. Systematics of these parameters are then obtained as a function of the ground-state quadrupole deformation. It was found that there is a possibility of extending such a systematics to include the fission product nuclei. Furthermore, we propose a method to estimate the covariance of the SRM parameters and its impact on the cross sections calculated with them quantitatively. It is shown that low-energy observables are more sensitive to the uncertainties in the SRM parameters, therefore, sensitive to the collective structure effects.

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Ground-State Band of the Neutron-Rich Transuranium Nucleus²⁵⁰Cm₁₅₄

Cited by 20 publications

References 18 publications

One-quasiparticle bands in neutron-richW187

One-quasiparticle bands in neutron-richW187

Towards Superheavies: Spectroscopy of 94 < Z < 98, 150 < N < 154 Nuclei

Systematics and uncertainties of Hamiltonian parameters of soft-rotator model for actinides and their implications for nuclear data calculations

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Ground-State Band of the Neutron-Rich Transuranium Nucleus250Cm154

Cited by 20 publications

References 18 publications

One-quasiparticle bands in neutron-richW187

One-quasiparticle bands in neutron-richW187

Towards Superheavies: Spectroscopy of 94 < Z < 98, 150 < N < 154 Nuclei

Systematics and uncertainties of Hamiltonian parameters of soft-rotator model for actinides and their implications for nuclear data calculations

Contact Info

Product

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About

Ground-State Band of the Neutron-Rich Transuranium Nucleus²⁵⁰Cm₁₅₄