Der Zerfall von Kohlenstoff 12 in drei α‐Teilchen bei der Kernreaktion <sup>11</sup>B(p,α) 2α

Dehnhard, D.; Kamke, Detlef; Krämer, Peter

doi:10.1002/andp.19644690311

Cited by 18 publications

(2 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…B atoms were detected utilizing a nuclear reaction 11 B(p,a)aa with a proton beam [7,8]. This reaction exhibits a broad resonance at proton energies around 0.62 MeV.…”

Section: Methodsmentioning

confidence: 99%

Channelling studies on the lattice location of B atoms in graphite

Yagi

Iwata

Urai

et al. 2004

Journal of Nuclear Materials

View full text Add to dashboard Cite

“…B atoms were detected utilizing a nuclear reaction 11 B(p,a)aa with a proton beam [7,8]. This reaction exhibits a broad resonance at proton energies around 0.62 MeV.…”

Section: Methodsmentioning

confidence: 99%

Channelling studies on the lattice location of B atoms in graphite

Yagi

Iwata

Urai

et al. 2004

Journal of Nuclear Materials

View full text Add to dashboard Cite

“…This reaction exhibits a narrow resonance with a resonance width of about 66 keV at about 1.8 MeV of a 11 B beam. 13,14) The energy of an incident 11 B beam (ϳ2 MeV) is reduced to about 1.8 MeV at the depth of a few thousand Å in a specimen, and there the resonance reaction takes place effectively to emit a particles. Hydrogen can be detected by measuring these a particles, whose energy ranges from zero to about 5 MeV.…”

Section: Experimental Methodsmentioning

confidence: 99%

The State of Hydrogen in Nb-based Nb-Mo Alloys Analyzed by the Channelling Method

Yagi

2003

ISIJ International

View full text Add to dashboard Cite

In order to locate hydrogen dissolved in metals a channelling method utilizing a nuclear reaction 1 H( 11 B, a)aa with a 11 B beam has been developed. This method has been applied to study the effect of metallic solutes on the state of hydrogen in metals. The lattice location of hydrogen in Nb-based Nb-Mo alloys with different concentrations (C Mo ) of undersized Mo atoms of 3, 10, 20 and 26 at% has hitherto been investigated. These results are summarized in this paper and the interaction of hydrogen with metal solutes is discussed. At low Mo concentrations less than 10 at% hydrogen is trapped by Mo atoms at room temperature due to attractive interaction to be located at sites displaced from tetrahedral (T) sites by about 0.6 Å toward the nearest neighbour Mo atom. In the case of C Mo ϭ3 at%, hydrogen is detrapped at 373 K and enter a T site. The number of H atoms trapped by one Mo atom is limited. It is 0.7-1.0 for C Mo ϭ3 at% and decreases with increasing C Mo . The excess H atoms are located at T sites. For C Mo ϭ20 at% such trapped site occupancy is not observed, and 70-80 % of the H atoms are located at T sites and the rest are at octahedral (O) sites at low H concentrations. For C Mo ϭ26 at%, most of the H atoms are located at T sites.KEY WORDS: hydrogen; lattice location; channelling analysis; solute atoms; Nb-Mo alloy.um, whose lattice location has been investigated extensively by both neutron and channelling methods, there has been only a few studies made in metallic alloys. 12) The present study for Nb-Mo alloys with the same crystal structure as Fe will give helpful information to investigations of the state of hydrogen in iron and its alloys. Experimental MethodThe reason why the nuclear reaction 1 H( 11 B, a)aa was applied is as follows. In the detection of impurities by ion beams, usually the Rutherford backscattering spectroscopy (RBS) is used, but this method is not useful to the detection of hydrogen. Therefore, the nuclear reaction was utilized. This reaction exhibits a narrow resonance with a resonance width of about 66 keV at about 1.8 MeV of a 11 B beam. 13,14) The energy of an incident 11 B beam (ϳ2 MeV) is reduced to about 1.8 MeV at the depth of a few thousand Å in a specimen, and there the resonance reaction takes place effectively to emit a particles. Hydrogen can be detected by measuring these a particles, whose energy ranges from zero to about 5 MeV. To locate hydrogen, this hydrogen detection technique was combined with the channelling method.Specimens are Nb and Nb-Mo alloy single crystal slices whose largest face is perpendicular to the ͗110͘ axis. They were annealed and then doped with hydrogen from the gas phase up to a desired concentration lower than the solubility limit. They were mounted on the specimen holder of the three-axis-goniometer. Channelling analyses were performed at room temperature for the ͗100͘ and ͗110͘ axial channels, the {100} planar channel, and, if necessary, the {111} planar channel at different spots on the same specimen with a 11 B ion beam of about 2 Me...

show abstract

Evaluation of DALITZ‐plots II

Kamke

1972

Annalen der Physik

View full text Add to dashboard Cite

AbstraotFor nuclear reactions with three particles in the final state inner parameters are defined. Particular experimental arrangements are diecueaed with respect to the behaviour of the inner parameters. It is shown that a complete and rather detailed survey of the kinematical relations in the l a b o r a t o r y s y s t e m can be given, including the variations when the total energy (determined by the incoming particle's energy of a nuclear reaction) is changed.

show abstract

Der Zerfall von Kohlenstoff 12 in drei α‐Teilchen bei der Kernreaktion ¹¹B(p,α) 2α

Cited by 18 publications

References 16 publications

Channelling studies on the lattice location of B atoms in graphite

Channelling studies on the lattice location of B atoms in graphite

The State of Hydrogen in Nb-based Nb-Mo Alloys Analyzed by the Channelling Method

Evaluation of DALITZ‐plots II

Contact Info

Product

Resources

About

Der Zerfall von Kohlenstoff 12 in drei α‐Teilchen bei der Kernreaktion 11B(p,α) 2α

Cited by 18 publications

References 16 publications

Channelling studies on the lattice location of B atoms in graphite

Channelling studies on the lattice location of B atoms in graphite

The State of Hydrogen in Nb-based Nb-Mo Alloys Analyzed by the Channelling Method

Evaluation of DALITZ‐plots II

Contact Info

Product

Resources

About

Der Zerfall von Kohlenstoff 12 in drei α‐Teilchen bei der Kernreaktion ¹¹B(p,α) 2α