Binding energies and nonradiative decay rates of He<i>d</i>μ molecular ions

Belyaev, V.B.; Kartavtsev, O. I.; Kochkin, V. I.; Kolganova, E. A.

doi:10.1103/physreva.52.1765

Cited by 12 publications

(9 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A close comparison of the existing theoretical results for κ dµHe , [27,29,30,73,74,75], with their experimental results obtained in the present paper and in Ref. [20] may throw some light on the mechanism of rotational J = 1 → J = 0 transitions of dµ 3 He molecules in the 2pσ state, labeled λ10 in Fig.…”

Section: Radiative Branching Ratio κ Dµhesupporting

confidence: 86%

“…Here, the decay rates λ 0 dec = 6 × 10 11 s −1 , λ 0 γ = 1.8 × 10 11 s −1 [30], λ 1 dec = 7 × 10 11 s −1 , and λ 1 γ = 1.55 × 10 11 s −1 (obtained by averaging the corresponding results taken from Refs. [27,29,30,73,74,75,76,77,78]) are model independent. Concerning the first mechanism, we used λ n = 2 × 10 13 s −1 , λ ext Aug = 8.5 × 10 11 s −1 [31], and λ ext Aug = 10 10 s −1 [32,33].…”

Section: Radiative Branching Ratio κ Dµhementioning

confidence: 99%

See 1 more Smart Citation

Experimental study ofμ-atomic andμ-molecular processes in pure helium and deuterium-helium mixtures

et al. 2005

View full text Add to dashboard Cite

We present experimental results of -atomic and -molecular processes induced by negative muons in pure helium and helium-deuterium mixtures. The experiment was performed at the Paul Scherrer Institute ͑Swit-zerland͒. We measured relative intensities of muonic x-ray K series transitions in ͑ 3,4 He͒ * atoms in pure helium as well as in helium-deuterium mixtures. The d 3 He radiative decay probabilities for two different helium densities in D 2 + 3 He mixture were also determined. Finally, the q 1sHe probability for a d atom formedin an excited state to reach the ground state was measured and compared with theoretical calculations using a simple cascade model. ͑see Refs. ͓43,44͔͒. The effective d 3 He decay rates for both rotational states, J = 0 and J = 1 are defined as dec J = ␥ J + e J + p J . ͑40͒ FIG. 7. Energy spectra of the delayed events in runs III ͑left͒ and IV ͑right͒. FIG. 8. Time distributions in runs III ͑left͒ and IV ͑right͒ within the energy range 5.74− 7.50 keV. EXPERIMENTAL STUDY OF -ATOMIC AND -MOLECULAR PROCESSES… PHYSICAL REVIEW A 71, 032723 ͑2005͒ 032723-9

show abstract

Section: Radiative Branching Ratio κ Dµhesupporting

confidence: 86%

Section: Radiative Branching Ratio κ Dµhementioning

confidence: 99%

Experimental study ofμ-atomic andμ-molecular processes in pure helium and deuterium-helium mixtures

et al. 2005

View full text Add to dashboard Cite

show abstract

“…Table VIII presents the different theoretical values for the radiative branching ratio. The calculations are those of Kino [6], Gershtein [14], Kravtsov [13], and Belyaev [15,16]. Except for Kravtsov [13] who includes the Auger decay channel λ e (see Fig.…”

Section: Radiative Branching Ratio κmentioning

confidence: 99%

Muon transfer from deuterium to helium

Augsburger¹,

Chatellard²,

Huot³

et al. 2003

Phys. Rev. A

View full text Add to dashboard Cite

We report on an experiment at the Paul Scherrer Institute, Villigen, Switzerland measuring x rays from muon transfer from deuterium to helium. Both the ground state transfer via the exotic dmu3,4He* molecules and the excited state transfer from mud* were measured. The use of CCD detectors allowed x rays from 1.5 keV to 11 keV to be detected with sufficient energy resolution to separate the transitions to different final states in both deuterium and helium. The x-ray peaks of the dmu3He* and dmu4He* molecules were measured with good statistics. For the D2+3He mixture, the peak has its maximum at E_dmu3He = 6768 +- 12 eV with FWHM Gamma_dmu3He = 863 +- 10 eV. Furthermore the radiative branching ratio was found to be kappa_dmu3He = 0.301 +- 0.061. For the D_2+4He mixture, the maximum of the peak lies at E_dmu4He = 6831 +- 8 eV and the FWHM is Gamma_dmu4He = 856 +- 10 eV. The radiative branching ratio is kappa_dmu4He = 0.636 +- 0.097. The excited state transfer is limited by the probability to reach the deuterium ground state, q_1s. This coefficient was determined for both mixtures: q^3He_1s = 68.9 +- 2.7% and q^4He_1s = 90.1 +- 1.5.Comment: 9 pages, 11 figure

show abstract

“…The rates λ 0 Σ = 6 × 10 11 s −1 and λ 1 Σ = 7 × 10 11 s −1 (averaged from the data [26,27,[30][31][32]39,76]) were used 2 As follows from equation (35) λ J =1 f is absent there. It is explained by the quenching of the rate of the nuclear fusion reaction from J = 1 in comparison with J = 0, demonstrated in Table 1 (about three orders of magnitude).…”

Section: Fusion Rates Discussion Of the Resultsmentioning

confidence: 99%

“…By now the experimental discovery of MMCE has been confirmed in a number of experiments studying muon transfer from hμ to He isotopes. Formation rates of the charge-asymmetrical dμHe, and pμHe systems were measured [14][15][16][17][18][19][20][21][22][23] and calculated [24][25][26][27][28][29][30][31][32] with good accuracy, and partial decay rates of such complexes were found.…”

Section: Introductionmentioning

confidence: 99%

Study of the nuclear fusion in a muonic dμ3He complex

et al. 2006

View full text Add to dashboard Cite

An experimental study of the nuclear fusion reaction in the charge-asymmetrical dμ 3 He complex (dμ 3 He → α (3.5 MeV) + p (14.64 MeV)) is presented. The 14.64 MeV protons were detected by three pairs of Si(dE − E) telescopes placed around the cryogenic target filled with D2 + 3 He gas at 34 K. The 6.85 keV γ rays emitted during the de-excitation of the dμ 3 He complex were detected by a germanium detector. The measurements were performed at two D2 + 3 He target densities, ϕ = 0.0585 and ϕ = 0.168 (relative to liquid hydrogen density) with an atomic concentration of 3 He c3 He = 0.0496. The values of the effective rate of nuclear fusion in dμ 3 He were obtained for the first time: λf = (4.5 +2.6 −2.0 ) × 10 5 s −1 (ϕ = 0.0585); λf = (6.9 +3.6 −3.0 ) × 10 5 s −1 (ϕ = 0.168). The J = 0 nuclear fusion rate in dμ 3 He was derived: λ J =0 f = (9.7 +5.7 −2.6 ) × 10 5 s −1 (ϕ = 0.0585); λ J =0 f = (12.4 +6.5 −5.4 ) × 10 5 s −1 (ϕ = 0.168).

show abstract

Binding energies and nonradiative decay rates of Hedμ molecular ions

Cited by 12 publications

References 13 publications

Experimental study ofμ-atomic andμ-molecular processes in pure helium and deuterium-helium mixtures

Experimental study ofμ-atomic andμ-molecular processes in pure helium and deuterium-helium mixtures

Muon transfer from deuterium to helium

Study of the nuclear fusion in a muonic dμ3He complex

Contact Info

Product

Resources

About