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The ^1^8O(p, α)^1^5N reaction at stellar energies

Lorenz-Wirzba, H. ; Schmalbrock, P. ; Trautvetter, H.P. ; [et al.]

Amsterdam : Elsevier

Nuclear Physics, Section A 313 (1979), S. 346-362

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ISSN: 0375-9474

Keywords: Nuclear reaction

Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Topics: Physics

Type of Medium: Electronic Resource

URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9474(79)90505-0

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2

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Voltage calibration of low-energy accelerators (1977)

Freye, T. ; Lorenz-Wirzba, H. ; Cleff, B. ; [et al.]

Springer

The European physical journal 281 (1977), S. 211-218

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ISSN: 1434-601X

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract The12C(p, γ)13N reaction has been used as a method to determine the absolute proton beam energy in the region ofE p =150–350 keV with a precision of the order of 0.4 keV. The method makes use of the resulting captureγ-ray transition, whose intensity varies smoothly with beam energy and whose varying energy can be determined to high accuracy by comparison with precisely known energies ofγ-rays from radioactive sources. The energy calibration atE p =80–150 keV has been carried out with the use of the nonresonant capture reaction D(p, γ)3He. The results have been applied to determine the absolute energies of proton-induced resonances on several light target nuclei.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01408839

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3

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A differentially pumped and recirculating gas target

Rolfs, C. ; Gorres, J. ; Kettner, K.U. ; [et al.]

Amsterdam : Elsevier

Nuclear Instruments and Methods 157 (1978), S. 19-27

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ISSN: 0029-554X

Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics

Type of Medium: Electronic Resource

URL: http://linkinghub.elsevier.com/retrieve/pii/0029-554X(78)90583-9

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4

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The15N(p,α 0)12C reaction at stellar energies (1982)

Redder, A. ; Becker, H. W. ; Lorenz-Wirzba, H. ; [et al.]

Springer

The European physical journal 305 (1982), S. 325-333

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ISSN: 1434-601X

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract The15N(ρ, α0)12C reaction has been investigated in the energy range ofE p (lab)=78-810keV. The measurement of the excitation functions and α-particle angular distributions involved solid targets as well as a quasi-point supersonic jet gas target. The determination of absolute cross sections has been carried out with the gas target. The observed energy dependence of the total cross sections can be described in terms of two-level Breit-Wigner shapes including the resonances atE p (J π)=335(1−) and 1,028(1−)keV. The data lead to a zero-energy intercept of the astrophysicalS(E) factor ofS(0)= 65±4MeV-b. The angular distributions are asymmetric around 90° and require an additional amplitude in the reaction mechanism, which interferes predominantly with the 335 keV resonance. The origin of this background amplitude is discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01419081

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5

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The12C+12C reaction at subcoulomb energies (I) (1980)

Kettner, K. U. ; Lorenz-Wirzba, H. ; Rolfs, C.

Springer

The European physical journal 298 (1980), S. 65-75

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ISSN: 1434-601X

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract The reaction12C+12C has been studied in the energy rangeE cm=2.45–6.15 MeV byγ-ray spectroscopy. Gamma-ray transitions from a large number of excited states in20Ne,23Na and23Mg were observed, which show strong and rapid yield variations. When the influence of the Coulomb barrier is removed, these structures appear superimposed on a flat reaction yield, which does not show a strong increase at low energies, in contrast to previous work. These results obviate the need for the hypothesis of absorption under the barrier at least down toE cm=2.45 MeV. The nuclear and astrophysical aspects of the data are discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01416030

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