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CERN Document Server 找到 2,044 笔记录  1 - 10下一个最後  跳到记录: 检索需时 0.31 秒. 
1.
(100)
Evidence for the transfer of negative muons from muonic deuterium to helium atoms / Bertin, A ; Vitale, A ; Zavattini, E
The transfer processes of negative muons from hydrogen or deuterium muonic atoms to /sub z/Y nuclei (where the mu p and mu d systems are in the 1S ground state) are known to occur, in general, with large rates. Possible explanations of this are mentioned and some experimental results on the muon transfer rate from D to He are discussed. [...]
1977 - Published in : Nuovo Cimento, Lett.: 18 ser.2 (1977) , no. 12, pp. 381-7
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2.
(91)
Experimental study on the ( mu /sup 4/He)/sub 2S//sup +/ metastable system in helium gas / Bertin, A ; Carboni, G ; Duclos, J ; Gastaldi, Ugo ; Gorini, G ; Neri, G ; Picard, J ; Pitzurra, O ; Placci, A ; Polacco, E et al.
The authors report the results of an experimental investigation on the properties of the ( mu He)/sub 2S//sup +/ metastable muonic system, which was performed stopping negative muons in a pure helium target at pressures ranging from 10 to 50 atm, and observing the total yield and the differential time distribution of the X-rays released in delayed coincidence with the arrival of muons. At each pressure P, information was obtained on the following quantities: a) the total disappearance rate lambda /sub 2S, tot/(P) of the ( mu He)/sub 2S//sup +/ system, b) the disappearance rates lambda /sub A/(P) and lambda /sub St/(P) of the ( mu He)/sub 2S//sup +/ system for external Auger effect and Stark-mixing collisions. [...]
Geneva : CERN, 1975 - Published in : Nuovo Cimento B: 26 ser.2 (1975) , no. 2, pp. 433-80
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3.
(78)
Measurement of the Auger effect in the ($\mu^{4}$He$)$\^{+}\_{2s}$ / Carboni, G ; Duclos, J ; Gastaldi, Ugo ; Gorini, G ; Neri, G ; Picard, J ; Pitzurra, O ; Placci, A ; Polacco, E ; Torelli, G et al.
The authors present some results of an experimental study which was performed to evaluate the contribution of the external Auger effect on the de-excitation of the ( mu /sup 4/He)/sub 2s//sup +/ system. Such a metastable system is formed when negative muons are slowed down in a helium target; the muons, initially captured in highly excited levels, promptly (in a time of 10/sup -11/s and through an electromagnetic cascade) reach either the fundamental level 1s or, with a small probability, the 2s level. [...]
1973 - Published in : Nuovo Cimento, Lett.: 6 ser.2 (1973) , no. 7, pp. 233-7
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4.
(68)
Transfer rates of negative muons from deuterium mesoatoms to helium, neon, argon, krypton, xenon and nitrogen atoms / Placci, Alfredo ; Zavattini, Emilio ; Bertin, A ; Vitale, A
1967 - Published in : Nuovo Cimento 52 (1967) 1274-1286
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5.
(61)
Measurement of the initial population and decay rate of the ($\mu ^{4}He)_{2S}^{+}$ system in a helium target at 50 atm / Bertin, A ; Carboni, G ; Gorini, G ; Pitzurra, O ; Polacco, E ; Torelli, G ; Vitale, A ; Zavattini, E
The fraction ( epsilon /sub 25/) of negative muons captured by the 2S level of He atoms and the lifetime tau /sub 2S/ of the muons at this level has been observed with pure helium gas at 50 'atm' and 293K. epsilon /sub 2S/, with no Stark effect, =(4.3+or-0.6)*10/sup -2/, for max. [...]
1974 - 12 p. - Published in : Phys. Rev. Lett. 33 (1974) 253-256 APS Published version, local copy: PDF;
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6.
(58)
Direct measurement of the transfer rates of muons from $\mu p$ muonic atoms to argon, krypton and xenon atoms / Placci, Alfredo ; Zavattini, Emilio ; Bertin, A ; Vitale, A
1969 - Published in : Nuovo Cimento 64 (1969) 1053-1067
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7.
(57)
Measurement of the 2P3/2-S1/2 energy difference in the $(\mu-4He)+$ muonic ion by means of a tunable infrared dye-laser / Bertin, A ; Carboni, G ; Duclos, J ; Gastaldi, Ugo ; Gorini, G ; Neri, G ; Picard, J ; Pitzurra, O ; Placci, Alfredo ; Polacco, E et al.
Results of an experiment to measure the 2P/sub 3/2/-2S/sub 1/2/ energy difference S/sub 1/ in the muonic ( mu /sup -4/He)/sup +/ ion are presented; it was found that S/sub 1//sup exp/=1.5274+or-0.0009 eV. Comparison with QED predictions shows that there is agreement between theory and experiment within 0.0087 eV; this limitation is mainly due to the uncertainty with which the r.m.s. [...]
1975 - Published in : Phys. Lett. B 55 (1975) 411-414
In : The meson factories, pp.583-586
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8.
(48)
Measurement of the rate lambda /sub e/ for the reaction mu p+d to mu d +p at room temperature / Bertin, A ; Bruno, M ; Placci, A ; Vitale, A ; Zavattini, E
The authors have performed this measurement at the muon channel of the 600 MeV CERN synchrocyclotron, by slowing-down negative muons in a gaseous target of ultrapure hydrogen, contaminated by small amounts of deuterium and xenon. The experiment was carried out using an already existing apparatus to measure the time distribution of the decay electrons coming from muons stopped in the gaseous target. [...]
1972 - Published in : Nuovo Cimento, Lett.: 4 ser.2 (1972) , no. 11, pp. 449-53
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9.
(36)
Measurement of the number of metastable $(\mu^{4}He)^{+}$ atoms obtained by stopping negative muons in gaseous helium in the 11-50 atm pressure range / Bertin, A ; Carboni, G ; Castaldi, U ; Duclos, J ; Gorini, G ; Neri, G ; Picard, J ; Pitzurra, O ; Placci, Alfredo ; Polacco, E et al.
1974. - 4 p.
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10.
(36)
Repolarization Of Muons In Muonic Atoms With Polarized Nuclei / Hambro, L ; Mukhopadhyay, N C
CERN-TH-2263.- Geneva : CERN, 1977 - Published in : Phys. Lett. B 68 (1977) 143-6 Fulltext: PDF;
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