Half-Life of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Li</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>11</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>, of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Na</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /

Klapisch, R.; Thibault-Philippe, C.; Détraz, C.; Chaumont, J.; Bernas, R.; Beck, E. M.

doi:10.1103/physrevlett.23.652

Cited by 59 publications

(32 citation statements)

References 15 publications

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“…That large deformation was explained by considering intruder effects which suggest a clear vanishing of the shell gap between the sd and pf shells around N = 20 [4]. Later, in many neutron-rich nuclei around N ∼ 20 and 28, large deviations in the nuclear structure from conventional shell models were observed [5][6][7][8][9][10][11]. These observation have been explained by considering tensor interactions, three-body interaction, etc.…”

Section: Introductionmentioning

confidence: 97%

Ground-state configuration of neutron-rich Al35 via Coulomb breakup

Chakraborty¹,

Pramanik²,

Aumann³

et al. 2017

Phys. Rev. C

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The ground-state configuration of 35 Al has been studied via Coulomb dissociation (CD) using the LAND-FRS setup (GSI, Darmstadt) at a relativistic energy of ∼403 MeV/nucleon. The measured inclusive differential CD cross section for 35 Al, integrated up to 5.0 MeV relative energy between the 34 Al core and the neutron using a Pb target, is 78(13) mb. The exclusive measured CD cross section that populates various excited states of 34 Al is 29(7) mb. The differential CD cross section of 35 Al → 34 Al + n has been interpreted in the light of a direct breakup model, and it suggests that the possible ground-state spin and parity of 35 Al could be, tentatively, 1/2 + or 3/2 + or 5/2 + . The valence neutrons, in the ground state of 35 Al, may occupy a combination of either l = 3,0 or l = 1,2 orbitals coupled with the 34 Al core in the ground and isomeric state(s), respectively. This hints of a particle-hole configuration of the neutron across the magic shell gaps at N = 20,28 which suggests narrowing the magic shell gap. If the 5/2 + is the ground-state spin-parity of 35 Al as suggested in the literature, then the major ground-state configuration of 35 Al is a combination of 34 Al(g.s.; 4 − ) ⊗ ν p 3/2 and 34 Al(isomer; 1 + ) ⊗ ν d 3/2 states. The result from this experiment has been compared with that from a previous knockout measurement and a calculation using the SDPF-M interaction.

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Section: Introductionmentioning

confidence: 97%

Ground-state configuration of neutron-rich Al35 via Coulomb breakup

Chakraborty¹,

Pramanik²,

Aumann³

et al. 2017

Phys. Rev. C

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“…As the name implies, OSTIS uses thermal ionization in a surface-ionization ion source first developed by Bernas etal. [16,17] to provide positive ions of fission product Rb and Cs for mass separation. The target/ion source consists of a Re oven containing 2g of 90~o enriched 235U embedded in a carbon matrix.…”

Section: Introductionmentioning

confidence: 99%

Half-lives and delayed neutron emission probabilities of short-lived Rb and Cs precursors

et al. 1979

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Half-lives and delayed-neutron emission probabilities (P,) of short-lived Rb and Cs precursors in the mass chains 94 98 and 143 147 were measured. Sources of isotope separated nuclides were obtained from the on-line mass-separator OSTIS installed at the Grenoble high-flux reactor. A new P,-value of (25.4_+3.2)% is given for the (214_+30)ms ~TCs; the P,-values of nine alkali precursor nuclides were redetermined: (2,730_+20)ms 94Rb with (9.7_+0.

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“…This is clearly at variance with all the data shown in Figs. [7][8][9][10][11]. The case for 11 B is shown in Fig.…”

Section: Except Formentioning

confidence: 99%

“…study·could.be approximately expressed by the empirical relation- for Z = [6][7][8][9][10][11], and £ = 1.2 for Z = [12][13][14][15][16][17][18]. If we define T as the thickness of the ~E detector it is possible to derive from the above relationship the following expression, which has the useful feature that the quantity T/a is a constant for a particle with a given Z and A regardless of the energy of the particle.…”

mentioning

confidence: 99%

Fragment Production in the Interaction of 5.5-GeV Protons with Uranium

1971

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'ABSTRACTThe energy spectra of nuclear fragments produced by the interaction of 5.5-GeV protons with uranium have been determined at several laboratory angles by means of dE/dx -E measurements with semiconductor detector telescopes. Individual isotopes of the elements from hydrogen to carbon were resolved and from nitrogen to argon the study was continued for the elements without isotopic separation. The evaporation-like energy spectra were integrated to obtain angular distributions and total cross sections for the isotopes of helium through carbon. Total cross sections for many rare isotopes were also estimated. The yield surface constructed from these cross sections has a ridge-like shape positioned 9ne neutron in excess of the line of beta stability. The yields fall off more steeply on the neutron-deficient side and exhibit odd-even effects reflecting those of the mass surface. The energy spectra of the neutron-deficient isotopes differ from the others in that the high-energy parts of the spectra are more pronounced and flatter, and the angular distributions are more forward peaked.Some of the energy spectra were fitted with calculated curves based on the isotropic evaporation df fragments from a system moving along the beam axis.The apparent Coulomb barriers obtained from this analysis were about one half -iv-UCRL-18996 the nominal Coulomb barriers and the apparent nuclear temperatures fell in the 10 to 13 MeV range. For the highest energy fragments observed at 90° the apparent temperatures rose to 20 MeV. From the forward-backward shifts in energy it was deduced that the average velocity of the moving system is about 0.006 c and that there is a positive correlation between this velocity and the velocity of the fragments in the moving system. However, all of the data are more peaked forward in intensity than can be explained by this simple two-step model.Radiochemical cross sections are also presented for the production of 7 Be from uranium, silver, and aluminum, and for 22 Na from aluminum. UCRL-18996

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Half-Life ofLi11, ofNa

Cited by 59 publications

References 15 publications

Ground-state configuration of neutron-rich Al35 via Coulomb breakup

Ground-state configuration of neutron-rich Al35 via Coulomb breakup

Half-lives and delayed neutron emission probabilities of short-lived Rb and Cs precursors

Fragment Production in the Interaction of 5.5-GeV Protons with Uranium

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