Spectroscopy of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Rf</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>257</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>

Qian, J.; Heinz, A.; Khoo, T. L.; Janssens, R. V. F.; Peterson, D.; Seweryniak, D.; Ahmad, I.; Asai, Mitsuteru; Back, B. B.; Carpenter, M. P.; Garnsworthy, A. B.; Greene, J. P.; Hecht, A. A.; Jiang, C. L.; Kondev, F. G.; Lauritsen, T.; Lister, C. J.; Robinson, Andrew; Savard, G.; Scott, Robert H.; Vondrasek, R.; Wang, X.; Winkler, R.

doi:10.1103/physrevc.79.064319

Cited by 34 publications

(21 citation statements)

References 50 publications

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“…This assumption is supported by results of recent spectroscopy studies, where a number of one and multi quasiparticle states were calculated in the energy range from 1 to 2 MeV, which could form the required isomers [121]. Already known in 257 Rf is an isomer having a half-life of (160 +42 −31 ) μs [121,122]. In the right range of lifetimes are isomers known in the isotones 251 Cf (38 ns, 1.3 μs) [20] and 253 Fm (0.5 μs) [123].…”

Section: Properties Of Cold-fusion Reactionssupporting

confidence: 58%

Synthesis of superheavy elements by cold fusion

Hofmann¹

2011

Radiochimica Acta

126

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Summary.The new elements from Z = 107 to 112 were synthesized in cold fusion reactions based on targets of lead and bismuth. The principle physical concepts are presented which led to the application of this reaction type in search experiments for new elements. Described are the technical developments from early mechanical devices to experiments with recoil separators. An overview is given of present experiments which use cold fusion for systematic studies and synthesis of new isotopes. Perspectives are also presented for the application of cold fusion reactions in synthesis of elements beyond element 113, the so far heaviest element produced in a cold fusion reaction. Further, the transition of hot fusion to cold fusion is pointed out, which occurs in reactions for synthesis of elements near Z = 126 using actinide targets and beams of neutron rich isotopes of elements from iron to germanium.

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Section: Properties Of Cold-fusion Reactionssupporting

confidence: 58%

Synthesis of superheavy elements by cold fusion

Hofmann¹

2011

Radiochimica Acta

126

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“…[4][5][6][7][8] for 245 Pu, 247 Cm, and 249 Cf, and from the present results for 251 Fm. Although several experimental data are available for excited states in 253 No [26][27][28][29][30], their configuration assignments are mostly tentative. Thus we only plotted the firmly established 5/2 + [622] state at 167 keV [28] and the reasonably evaluated 1/2 + [620] state at 670 keV [27,29] To discuss the trends of the experimental level energies, we calculate the ground-state deformations and energies of one-quasiparticle states in the N = 151 isotones using the macroscopic-microscopic model whose details are described in Ref.…”

Section: Lifetimes Of γ Transitionsmentioning

confidence: 99%

“…Their calculation shows a gradual increase of the 1/2 + [620] energy with increasing atomic number, but its Z dependence is smaller than the experimental one at Z 100. Qian et al[29] also calculated the energies of the 1/2 + [620] states in the N = 151 isotones using the deformation parameters taken from Ref [31]. and with a Woods-Saxon potential.…”

mentioning

confidence: 99%

Neutron one-quasiparticle states in251Fm151populated via theαdecay of
Asai
¹
,
Tsukada
²
,
Haba
³

et al. 2011
Phys. Rev. C
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Excited states in 251 Fm populated via the α decay of 255 No are studied in detail through α-γ coincidence and α fine-structure measurements. Five excited states reported previously in 251 Fm are firmly established through the α-γ coincidence measurement, and rotational bands built on one-quasiparticle states are newly established through the α fine-structure measurement. Spin-parities and neutron configurations of the excited states in 251 Fm as well as the ground state of 255 No are definitely identified on the basis of deduced internal conversion coefficients, lifetimes of γ transitions, rotational-band energies built on one-quasiparticle states, and hindrance factors of α transitions. It is found that the excitation energy of the 1/2 + [620] state in N = 151 isotones increases with the atomic number, especially at Z 100, while that of the 1/2 + [631] state decreases at Z = 100. Ground-state deformations and energies of neutron one-quasiparticle states in the N = 151 isotones are calculated using a macroscopic-microscopic model, and the energy systematics of the one-quasiparticle states in the isotones are discussed in terms of the evolution of nuclear deformation involving the hexadecapole (β 4) and hexacontatetrapole (β 6) deformations.

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“…This technological development has been motivated by the large number of possible applications, several of which rely on coherent population transfer techniques. A partial list of such applications is: stimulated Raman adiabatic passage (STI-RAP) [6][7][8][9], adiabatic rapid passage (ARP) [10], Raman chirped adiabatic passage (RCAP) [11,12], temporal coherent control (TCC) [13,14], coherent population trapping [15,16], optical control of chemical reactions [17,18], electromagnetically induced transparency (EIT) [15,[19][20][21][22], efficient generation of XUV radiation [23][24][25], breakdown of dipole blockade obtained driving atoms by phase-jump pulses [26]. Moreover, recently two schemes for efficient and fast coherent population transfer have been presented [27], which use chirped and non-chirped few-cycles laser pulses.…”

Section: Introductionmentioning

confidence: 99%

“…The presence of few optical cycles in the pulse gives a constant phase difference between the carrier wave and the pulse shaped envelope [34], in contrast with many cycle pulses [26,35,36]. Moreover, optimizing the pulses parameters is proven to enhance the excited state population [37] or optimizing coherence in two-level systems (TLSs) [38].…”

Section: Introductionmentioning

confidence: 99%

Ultra-short strong excitation of two-level systems

Jha

Eleuch

Grazioso

2014

Optics Communications

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We present a model describing the use of ultra-short strong pulses to control the population of the excited level of a two-level quantum system. In particular, we study an off-resonance excitation with a few cycles pulse which presents a smooth phase jump i.e. a change of the pulse's phase which is not step-like, but happens over a finite time interval. A numerical solution is given for the time-dependent probability amplitude of the excited level. The control of the excited level's population is obtained acting on the shape of the phase transient, and other parameters of the excitation pulse.Comment: 6 pages, 5 figures this version is a rewriting of the previous one, with several change

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Spectroscopy ofRf257

Cited by 34 publications

References 50 publications

Synthesis of superheavy elements by cold fusion

Synthesis of superheavy elements by cold fusion

Neutron one-quasiparticle states in251Fm151populated via theαdecay of
Asai
¹
,
Tsukada
²
,
Haba
³

et al. 2011
Phys. Rev. C
Self Cite

Ultra-short strong excitation of two-level systems

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Spectroscopy ofRf257

Cited by 34 publications

References 50 publications

Synthesis of superheavy elements by cold fusion

Synthesis of superheavy elements by cold fusion

Neutron one-quasiparticle states in251Fm151populated via theαdecay ofAsai1, Tsukada2, Haba3 et al. 2011Phys. Rev. CSelf Cite

Ultra-short strong excitation of two-level systems

Contact Info

Product

Resources

About

Neutron one-quasiparticle states in251Fm151populated via theαdecay of
Asai
¹
,
Tsukada
²
,
Haba
³

et al. 2011
Phys. Rev. C
Self Cite