Mesure de l'énergie des ions lourds par la méthode des protons projetés

Bimbot, R.; Negra, S. Della; Gauvin, H.; Tamain, B.

doi:10.1051/rphysap:01978001308039300

Cited by 11 publications

(6 citation statements)

References 5 publications

(9 reference statements)

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“…8. In the final treatment of experimental data the energy loss of the 4~ ions in the degraders and in the target was determined on the basis of the tables corrected according to the experimental results [15].…”

Section: Description Of Experimentsmentioning

confidence: 99%

A study of fusion reactions between206, 207Pb nuclei and40Ar ions near the coulomb barrier

et al. 1979

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Section: Description Of Experimentsmentioning

confidence: 99%

A study of fusion reactions between206, 207Pb nuclei and40Ar ions near the coulomb barrier

et al. 1979

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“…Recently, the validity of this relation has been carefully tested by direct measurements of beam energies [24]. The measured values were, on the average, 2 % smaller than those given by relation (1).…”

Section: Beamsmentioning

confidence: 98%

“…As no direct measurements were made during the experiments presented here, a systematic correction of -2 % has been applied to all energies calculated by (1). This procedure leads to an uncertainly of + 3 % on the incident energies [24].…”

Section: Beamsmentioning

confidence: 99%

Deeply inelastic transfer reactions induced by heavy ions in rare-earth targets

et al. 1980

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Recoil techniques have been used for a systematic study of deeply inelastic transfer reactions induced in rare earth targets by 4~ 52Cr, 56Fe and 63Cu projectiles. The targets were separated isotopes of Eu, Sin, Nd and Pr. The residual nuclei 149gTb, 15~ and a 51Dy were identified by their radioactive properties. The reactions studied involved the transfer of 3 to 7 charges from projectile to target. The c.m. angular and energy distributions were measured over the whole angular range from 0 to 180 ~ (c.m.). A special device was used to measure accurately the c.m. energy of products emitted in the angular range 170-180 ~ in the c.m.s. The c.m. angular distributions depend strongly on the ratio of the incident energy to the strong interaction barrier, and slightly on the number of transferred charges. The c.m. energy distributions are typical of completely damped collisions for 6-charge transfer reactions, and include a contribution of partially damped collisions for 4-charge transfer reactions. A kinematic analysis was used to determine the most probable number of neutrons transferred in the first reaction step with a given number of protons. The numbers found correspond to equilibration of the neutron to proton ratio in the composite system.

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“…E= A(1), (A being the ion mass) with a cor-4.84 rection of -1.3 % to take into account the systematic deviations observed between the measured and calculated energies [12]. When A1 degraders were used, the energy was calculated from the recent measurements of Bimbot et al [13].…”

Section: F2rmentioning

confidence: 99%

Production of149gTb in deep inelastic transfer reactions: An approach to the angular momentum of fragments

et al. 1979

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The excitation functions for deep inelastic reactions in which two to six charges are transferred from 4~ and 63Cu ions to rare earth targets have been measured using activation techniques, the observed radionuclides being 150, 151Dy and 149gTb. From the comparison of the curves relative to 149gTb and those relative to 15~ it was deduced that the low spin isomer 149gTb was produced with significant probability for low incident energies. Using data from (heavy ions, xn) reactions, it was possible to attribute this production to the deexcitation of Tb fragments formed in deep inelastic transfers with angular momenta lower than 9 h. This result is in good agreement with the angular momentum calculations performed under the hypothesis that the initial angular momentum window leading to deep inelastic reactions is situated between the critical angular momentum for fusion and that corresponding to grazing collisions. As far as Cu induced reactions are concerned, both hypothesis of rolling and sticking are consistent with the experimental data. For Ar induced reactions, the results indicate that the stage of sticking is not reached when the incident energy is lower than 200 MeV.Nuclear Reactions: 142'145Nd, 144'a48Sm, 154Gd(Ar, X)151'lS~ 149gTb E=160 280MeV; measured a(E). ~44Nd, 14SSm, 151Eu, 154Gd(Cu, X)1~1' 15~ 149gTb. E=280-420 MeV measured a(E). Enriched targets. Deduced angular momentum of Tb fragments.

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Mesure de l'énergie des ions lourds par la méthode des protons projetés

Cited by 11 publications

References 5 publications

A study of fusion reactions between206, 207Pb nuclei and40Ar ions near the coulomb barrier

A study of fusion reactions between206, 207Pb nuclei and40Ar ions near the coulomb barrier

Deeply inelastic transfer reactions induced by heavy ions in rare-earth targets

Production of149gTb in deep inelastic transfer reactions: An approach to the angular momentum of fragments

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