The Reactions27Al(p, p')27Al and27Al( , p)30Si

Barros, F. de S.; Forsyth, P.D.; Jaffe, A.A.; Taylor, I.J.

doi:10.1088/0370-1328/73/5/312

Cited by 11 publications

(7 citation statements)

References 14 publications

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“…Barros et al [121] have measured angular distributions for a relatively thick (70 µg/cm 2 ) 27 Al target using nuclear track detection. From the measured angular distributions of the resolved p 0 , p 1 , p 2 , p 3 , and p 4 proton groups a total (α,p) cross section for 27 Al can be roughly estimated to about 54 mb.…”

Section: 26mentioning

confidence: 99%

“…Although the EXFOR database contains a lot of data for α-induced reactions on 27 Al, there are practically no data for the 27 Al(α,p) 30 Si reaction which dominates the total reaction cross section σ reac at low energies. Barros et al [121] have measured angular distributions for a relatively thick (70 µg/cm 2 ) 27 Al target using nuclear track detection. From the measured angular distributions of the resolved p 0 , p 1 , p 2 , p 3 , and p 4 proton groups a total (α,p) cross section for 27 Al can be roughly estimated to about 54 mb.…”

Section: Almentioning

confidence: 99%

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

Mohr

2015

Eur. Phys. J. A

100

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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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Section: 26mentioning

confidence: 99%

Section: Almentioning

confidence: 99%

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

Mohr

2015

Eur. Phys. J. A

100

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“…José d'Assunção Barros cultura material foi uma das áreas que mais se beneficiou das "preocupações crescentes com a vida cotidiana que surgiram no decurso do século XX". 19 O segundo ponto diz respeito à relação dos estudos do cotidiano e da vida privada com a história das mulheres e as teorias de gênero. Flavia Fernandes de Souza afirma que, no Brasil, as pesquisas sobre o espaço doméstico desenvolveram-se "especialmente nos domínios da História Social do Trabalho", porém, com profundas intersecções com a história das mulheres e a história do cotidiano, por exemplo.…”

Section: A Aquisição De Acervo E Sua Relação Com a Historiografia De unclassified

A aquisição de acervo no Museu Paulista (1990-2015)

Vieira

2020

An. mus. paul.

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RESUMO Este artigo, baseado na dissertação recentemente defendida pelo autor, apresenta considerações sobre a política e a prática de aquisição de acervo museológico no Museu Paulista durante o período de 1990 a 2015. A atual política de acervo da instituição foi implementada durante a gestão do professor Ulpiano Toledo Bezerra de Meneses no âmbito do plano diretor da instituição. Este documento foi fundamental por estabelecer definitivamente a atuação do museu no campo da História e Cultura Material, bem como por vincular a aquisição de acervo às linhas de pesquisa da instituição.

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“…T h e 24Mg(3He, ~t )~~M g reaction has been studied previously by Barros, Forsyth, Jaffe and Taylor (1959) and they have determined the energy levels of 23Mg. T h e angular distributions of alpha particles from this reaction have not been studied previously.…”

mentioning

confidence: 99%

“…The extracted beam of singly charged ,He ions was collimated by means of three slits, focused by magnetic lenses and passed into the target chamber 14 f t from the cyclotron. The alpha particles from the reaction were magnetically analysed and the spectra were recorded on nuclear plates using the apparatus described by Green and Middleton (1956) and Dalton, Hinds and Parry (1957).…”

mentioning

confidence: 99%

Density Distribution Profiles of Excess Minority Carriers Injected with 904-nm-Wavelength Laser Pulse into 400-µm-Thick Silicon Wafer

Munakata¹

2005

Jpn. J. Appl. Phys.

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Angular distributions of two alpha-particle groups from the reaction 24Mg(3He, a)23Mg at 5.5 MeV incident beam energy have been measured by magnetic analysis. For both groups a peak is observed in the forward direction, but for one of the groups an additional peak is observed at large angles of observation. An attempt has been made to explain the results in terms of a direct interaction mechanism.

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The Reactions²⁷Al(p, p')²⁷Al and²⁷Al( , p)³⁰Si

Cited by 11 publications

References 14 publications

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

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

A aquisição de acervo no Museu Paulista (1990-2015)

Density Distribution Profiles of Excess Minority Carriers Injected with 904-nm-Wavelength Laser Pulse into 400-µm-Thick Silicon Wafer

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