Measurements of delayed neutron emission from Np-237, Am-241, and Am-243

Saleh, H. H.; Parish, T.A.; Raman, S.

doi:10.2172/162197

Cited by 2 publications

(7 citation statements)

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“…After having been applied at GAMMASPHERE to isotopes up to Th in the 1990s, the technique was recently revisited, also at GAMMASPHERE, using various targets of 237 Np, 241 Am, 240,244 Pu, 248 Cm, 249 Cf and 249 251 -Cf mixture. From these experiments, rotational bands could be observed in 236,237 Np, 241,242 Am, 240,244 246 -Pu, 246 250 -Cm and 248 251 -Cf [390][391][392][393][394][395][396]. Note that in these experiments recoils were not stopped in the target itself, but in a Au backing.…”

Section: Inelastic Scattering and Transfer Reactions Using Pb Andmentioning

confidence: 99%

“…The evolution of the moment of inertia of rotational bands subsequently observed in the transuranium region is explained by invoking the high-j orbitals i 13 2 p or j 15 2 n in a large number of publications, see [143,264,302,328,329,352,353,390,391,393,394,412,448,455,[467][468][469][470][471][472][473][474][475], etc.…”

Section: Even-even Nucleimentioning

confidence: 99%

“…While alignment of j 15 2 n is most often predicted at the same frequency, it is more sharp, see e.g. [264,391,470,471].…”

Section: Even-even Nucleimentioning

confidence: 99%

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Nuclear structure features of very heavy and superheavy nuclei—tracing quantum mechanics towards the ‘island of stability’

Ackermann

Theisen

2017

Phys. Scr.

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The quantum-mechanic nature of nuclear matter is at the origin of the vision of a region of enhanced stability at the upper right end of the chart of nuclei, the so-called ‘island of stability’. Since the 1960s in the early second half of the last century, various models predict closed shells for proton numbers 114–126 and neutron numbers such as 172 or 184. Being stabilized by quantum-mechanic effects only, those extremely heavy man-made nuclear species are an ideal laboratory to study the origin of the strong nuclear interaction which is the driving force for matter properties in many fields ranging from microscopic scales like hadronic systems to cosmic scales in stellar environments like neutron stars. Since the 1950s, experiments on the synthesis of new elements and isotopes have also revealed various exciting nuclear structure features. The contribution of Bohr, Mottelson and Rainwater with, in particular, the development of the unified model played an essential role in this context. Although not anticipated in the region of the heaviest nuclei, many phenomena were subsequently discovered like the interplay of collective features manifesting themselves e.g. in nuclear deformation, ranging from spherical to prolate and oblate shapes with the possible occurrence of triaxial symmetries, and single particle states and their excitation into quasiparticle configurations. The continuous development of modern experimental techniques employing advanced detection set-ups was essential to reveal these exciting nuclear structure aspects in the actinide and transactinide regions since the production cross-section becomes extremely small with increasing mass and charge. Further technological progress, in particular, high intensity stable ion beam accelerator facilities presently under construction, as well as potentially in the farther future radioactive neutron rich ion beams provide a high discovery potential for the basic understanding of nuclear matter.

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Section: Inelastic Scattering and Transfer Reactions Using Pb Andmentioning

confidence: 99%

Section: Even-even Nucleimentioning

confidence: 99%

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Nuclear structure features of very heavy and superheavy nuclei—tracing quantum mechanics towards the ‘island of stability’

Ackermann

Theisen

2017

Phys. Scr.

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“…A total of five foils were irradiated, which represented 15 instantaneous irradiations. The results measured in this experiment are compared to those recommend values from computational calculations (Brady and England, 1989), and to some recent experimental data (Saleh and Parish, 1997) in Table 1 1. Saleh and Parish reported the thermal neutron-induced fission of Np-237.…”

Section: U(n2n)237u+ 237npmentioning

confidence: 82%

“…Measurements of delayed neutron emission from 'thermal' neutron induced fission of Np-237 were published early this year (Saleh and Parish, 1997). These authors measured five delayed neutron groups for Np-237.…”

Section: Historical Backgroundmentioning

confidence: 99%

Measurements of delayed neutron parameters for U-235 and Np-237

Loaiza

1997

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Measurements of delayed neutron emission from Np-237, Am-241, and Am-243

Cited by 2 publications

References 0 publications

Nuclear structure features of very heavy and superheavy nuclei—tracing quantum mechanics towards the ‘island of stability’

Nuclear structure features of very heavy and superheavy nuclei—tracing quantum mechanics towards the ‘island of stability’

Measurements of delayed neutron parameters for U-235 and Np-237

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