The (α, p) reaction on even nickel isotopes

Bucurescu, D.; Ivaşcu, M.; Semenescu, G.; Titirici, Maria Magdalena

doi:10.1016/0375-9474(72)90315-6

Cited by 40 publications

(18 citation statements)

References 19 publications

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“…), 1/2 − , 5/2 − , and 9/2 + states having important p 3/2 , p 1/2 , f 5/2 , and g 9/2 single-particle components, respectively. For 67 Cu the same conclusion is supported by a study with the (α,p) direct reaction [10]. The excitation energy of the 9/2 + state remains approximately constant from 61 Cu to 71 Cu [11].…”

Section: Introductionsupporting

confidence: 55%

“…As a neutron-rich nucleus, 67 Cu can be reached by a limited number of reactions. A level scheme at low excitation energies and low and medium spins was built [13] based on β-decay [14] and direct transfer reactions such as (d, 3 He) [7], (α,p) [10,15], and (t,p) [16]. The analysis of spectroscopic factors pointed out that both 3/2 − g.s.…”

Section: Introductionmentioning

confidence: 99%

“…The analysis of spectroscopic factors pointed out that both 3/2 − g.s. and 9/2 + 1 states have important single-particle π (2p 3/2 ) and π (1g 9/2 ) components, respectively [7,10]. Information on higher spin states was recently obtained by γ -ray spectroscopy in two deep-inelastic reaction studies [3,11].…”

Section: Introductionmentioning

confidence: 99%

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Fast-timing lifetime measurements of excited states inCu67

Niță¹,

Bucurescu²,

Mărginean³

et al. 2014

Phys. Rev. C

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The half-lives of the 9/2 + , 13/2 + , and 15/2 + yrast states in the neutron-rich 67 Cu nucleus were determined by using the in-beam fast-timing technique. The experimentally deduced E3 transition strength for the decay of the 9/2 + level to the 3/2 − ground state indicates that the wave function of this level might contain a collective component arising from the coupling of the odd proton p 3/2 with the 3 − state in 66 Ni. Theoretical interpretations of the 9/2 + state are presented within the particle-vibration weak-coupling scheme involving the unpaired proton and the 3 − state from 66 Ni and within shell-model calculations with a 56 Ni core using the jj44b residual interaction. The shell model also accounts reasonably well for the other measured electromagnetic transition probabilities.

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Section: Introductionsupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

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Fast-timing lifetime measurements of excited states inCu67

Niță¹,

Bucurescu²,

Mărginean³

et al. 2014

Phys. Rev. C

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“…Therefore the following study is restricted to the data by Seidlitz et al [96] and the data at the lowest energies by Bucurescu et al [95]. It turns out that the limited angular range of the angular distributions by Bucurescu et al [95] is not sufficient to derive the total reaction cross section σ reac from these data.…”

Section: 90]mentioning

confidence: 98%

Cross sections of α-induced reactions for targets with masses A ≈ 20–50 at low energies

Mohr

2015

Eur. Phys. J. A

104

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Abstract. A simple reduction scheme using so-called reduced energies E red and reduced cross sections σ red allows the comparison of heavy-ion induced reaction cross sections for a broad range of masses of projectile and target and over a wide energy range. A global behavior has been found for strongly bound projectiles whereas much larger reduced cross sections have been observed for weakly bound and halo projectiles. It has been shown that this simple reduction scheme works also well for α-particle induced reactions on heavy target nuclei, but very recently significant deviations have been seen for α+ 33 S and α+ 23 Na. Motivated by these unexpected discrepancies, the present study analyses α-induced reaction cross sections for targets with masses A ≈ 20 − 50. The study shows that the experimental data for α-induced reactions on nuclei with A ≈ 20 − 50 deviate slightly from the global behavior of reduced cross sections. However, in general the deviations evolve smoothly towards lower masses. The only significant outliers are the recent data for 33 S and 23 Na which are far above the general systematics, and some very old data may indicate that 36 Ar and 40 Ar are below the general trend. As expected, also the doubly-magic 40 Ca nucleus lies slightly below the results for its neighboring nuclei. Overall, the experimental data are nicely reproduced by a statistical model calculation utilizing the simple α-nucleus potential by McFadden and Satchler. Simultaneously with the deviation of reduced cross sections σ red from the general behavior, the outliers 23 Na, 33 S, 36 Ar, and 40 Ar also show significant disagreement between experiment and statistical model calculation.PACS. 25.55.-e 3H-, 3He-, and 4He-induced reactions -24.10.Pa Thermal and statistical models

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“…Neutron-rich Cu nuclei, with one proton outside the closed shell at Z = 28, provide valuable information on nuclear structure around the Ni shell closure [1][2][3][4]. In particular, single-and few-particle excitations reveal the rigidity of the closed shell core and can be used to test, in great detail, modern shell-model calculations.…”

Section: Introductionmentioning

confidence: 99%

Probing particle-phonon-coupled states in the neutron-rich nucleusCu65by lifetime measurements with fast-timing techniques

Bocchi¹,

Leoni²,

Bottoni³

et al. 2014

Phys. Rev. C

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The 65 Cu nucleus was populated by the 64 Ni(7 Li,α2n) 65 Cu reaction and the lifetime of the 9/2 + state at 2.5 MeV was measured by electronic fast-timing technique, providing the value τ = 37(3) ps. The reduced transition probability B(E3) = 8.82(165) W.u. is deduced and compared to theoretical predictions in the framework of a particle-vibration (weak) coupling model. The results indicate that the 9/2 + state is a member of the 3 − ⊗ πp3/2 multiplet, built by coupling the octupole 3 − phonon of 64 Ni to an unpaired proton in the p 3/2 level, confirming the robustness of core excitations in the medium mass nucleus 64 Ni.

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The (α, p) reaction on even nickel isotopes

Cited by 40 publications

References 19 publications

Fast-timing lifetime measurements of excited states inCu67

Fast-timing lifetime measurements of excited states inCu67

Cross sections of α-induced reactions for targets with masses A ≈ 20–50 at low energies

Probing particle-phonon-coupled states in the neutron-rich nucleusCu65by lifetime measurements with fast-timing techniques

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