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CERN Document Server 找到 2,049 笔记录  1 - 10下一个最後  跳到记录: 检索需时 0.53 秒. 
1.
(100)
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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2.
(91)
Preliminary experimental results on the energy difference between the 2S$\_{1/2}$ and 2P$\_{3/2}$ levels of the ($\mu^{4}$He)+ system / Bertin, A ; Carboni, G ; Duclos, J ; Gastaldi, Ugo ; Gorini, G ; Neri, G ; Picard, J ; Pitzurra, O ; Placci, A ; Polacco, E et al.
1975 - Published in : At. Phys.: 4 (1975) , pp. 141-162
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3.
(81)
A high-power tunable dye laser apparatus used to induce transitions from 2S to 2P levels in muonic helium / Bertin, A ; Carboni, G ; Duclos, J ; Gastaldi, Ugo ; Gorini, G ; Neri, G ; Picard, J ; Pitzurra, O ; Placci, Alfredo ; Polacco, E et al.
1974. - 60 p.
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4.
(81)
Measurement of the $2P_{3/2} - 2S_{1/2}$ energy difference in the $(\mu^{-4}He)^{+}$L 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, A ; Polacco, E et al.
1975. - 10 p.
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5.
(73)
Measurement of the 2S$\_{½}$-2P$\_{3/2}$ level splitting in muonic helium - a test of quantum electrodynamics predictions on electronic vacuum polarization / Carboni, G ; Gastaldi, Ugo ; Neri, G ; Pitzurra, O ; Polacco, E ; Torelli G ; Bertin, A ; Gorini, G ; Placci, A ; Zavattini, E et al.
Geneva : CERN, 1976 - 47 p. - Published in : Nuovo Cimento A 34 (1976) 493-514
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6.
(54)
Transfer of negative pions from gaseous hydrogen to argon / Picard, J ; Placci, Alfredo ; Polacco, E ; Zavattini, Emilio ; Carboni, G ; Gastaldi, Ugo ; Gorini, G ; Stefanini, G ; Torelli, G ; Duclos, J et al.
1971 - Published in : Nuovo Cimento, Lett. 2 (1971) 957-959
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7.
(46)
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.
(44)
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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9.
(39)
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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10.
(35)
A new method to induce transitions in muonic atoms using a high-power tunable dye laser coupled to a stopping muon beam / Bertin, A ; Carboni, G ; Duclos, J ; Gastaldi, Ugo ; Gorini, G ; Neri, G ; Picard, J ; Pitzurra, O ; Placci, A ; Polacco, E et al.
An apparatus is described in which a ruby-pumped dye laser is used to induce transitions from the 2S to the 2P levels of the muonic ion ( mu He)/sup +/. The dye laser supplies infra-red radiation pulses in the wavelengths (8040-8180) AA, at typical repetition rates of 1 pulse every 4 s, with an energy release per pulse of 300 mJ for 1.2 J pumping energy. [...]
1974 - Published in : Nuovo Cimento B: 23 ser.2 (1974) , no. 2, pp. 489-526
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