1999 Vol. 23, No. 3
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Abstract:
Considering the absorption of extragalactic high energy gamma rays by cosmic background photons, the possibility of measuring Hubble Constant and background infrared radiation with Yangbajing RPC carpet experiment is presented.The conclusion is that ...
Considering the absorption of extragalactic high energy gamma rays by cosmic background photons, the possibility of measuring Hubble Constant and background infrared radiation with Yangbajing RPC carpet experiment is presented.The conclusion is that ...
Abstract:
The temperature of hot nuclei was simultaneously deduced with double isotope ratios and with slope method at angle of 110°in 40Ar+159Tb and natAg reactions at 30 MeV/u. The values of isotopic temperature for different ratios, such as 1,2H/3,4He,2.3H/...
The temperature of hot nuclei was simultaneously deduced with double isotope ratios and with slope method at angle of 110°in 40Ar+159Tb and natAg reactions at 30 MeV/u. The values of isotopic temperature for different ratios, such as 1,2H/3,4He,2.3H/...
Abstract:
In this paper we present a timing pickup detector used at Radioactive Ion Beam Line in Lanzhou (RIBLL). It has low detection threshold and is radiation-resistant. The photons induced by radioactive beam ions passing through a thin plastic-scintillato...
In this paper we present a timing pickup detector used at Radioactive Ion Beam Line in Lanzhou (RIBLL). It has low detection threshold and is radiation-resistant. The photons induced by radioactive beam ions passing through a thin plastic-scintillato...
Abstract:
The design, structure and performances of RIB diagnostic devices for Radioactive Ion Beam Line in Lanzhou (RIBLL) are described. Several RIB diagnostic devices based on fiber are shown in greater detail. The devices have high detection efficiency, fa...
The design, structure and performances of RIB diagnostic devices for Radioactive Ion Beam Line in Lanzhou (RIBLL) are described. Several RIB diagnostic devices based on fiber are shown in greater detail. The devices have high detection efficiency, fa...
Abstract:
A He-jet laser bine-of-flight (TOF) mass spectrometer system is built. The sample atoms evaporated in the atomization chamber are used to simulate the reaction products. The sample atoms are transferred by helitim gas trough a thin capillary.After pa...
A He-jet laser bine-of-flight (TOF) mass spectrometer system is built. The sample atoms evaporated in the atomization chamber are used to simulate the reaction products. The sample atoms are transferred by helitim gas trough a thin capillary.After pa...
Abstract:
The decays t→cV(V= Z,γ, g) induced through loop processes are calculated in Topcolor-Assisted Multiscale Technicolor model. We find that the extended technicolor interactions provide the main contribution to these decays, and the total contribution c...
The decays t→cV(V= Z,γ, g) induced through loop processes are calculated in Topcolor-Assisted Multiscale Technicolor model. We find that the extended technicolor interactions provide the main contribution to these decays, and the total contribution c...
Abstract:
The infrared divergences in vacuum graghs of quark (ignored mass) field at high tempethere are calculated in detial by real-time formulation of Green function, a kind of infrared divergent integral related to F-D statistical factor is pointed out and...
The infrared divergences in vacuum graghs of quark (ignored mass) field at high tempethere are calculated in detial by real-time formulation of Green function, a kind of infrared divergent integral related to F-D statistical factor is pointed out and...
Abstract:
J/ψ and ψ′production cross sections in fixed-target experiment is calculated, considering the contributions from both color-singlet and color- octet mechanisms. The resultS are applied to the investigations of the J/ψ suppression and the ψ′/ψ ratio p...
J/ψ and ψ′production cross sections in fixed-target experiment is calculated, considering the contributions from both color-singlet and color- octet mechanisms. The resultS are applied to the investigations of the J/ψ suppression and the ψ′/ψ ratio p...
Abstract:
A new method used to select identical bands is given from the energies.More than one hundred superdeformed bands were analysed by this method, and many identical bands were found. A concept of quantized region is used to analyse the quantization of i...
A new method used to select identical bands is given from the energies.More than one hundred superdeformed bands were analysed by this method, and many identical bands were found. A concept of quantized region is used to analyse the quantization of i...
Abstract:
Using the Hamiltonian and the natural operators, we obtain a nonlinear spectrum-generating algebra for the symmetrical Pöschl-Teller Potential. This algebra gives a new method with obvious physical meaning to describe and solve the quantum motion in ...
Using the Hamiltonian and the natural operators, we obtain a nonlinear spectrum-generating algebra for the symmetrical Pöschl-Teller Potential. This algebra gives a new method with obvious physical meaning to describe and solve the quantum motion in ...
Abstract:
This paper describes the working principle and structure of the control system of the Radioactive Ion Beam Line in Lanzhou (RIBLL).
This paper describes the working principle and structure of the control system of the Radioactive Ion Beam Line in Lanzhou (RIBLL).
Abstract:
In this paper the equations of motion for charged particles in radio-frequency quadrupole lenses are studied, the transfer matrix elements are derived and the relations between the focusing properties of the lenses and the lens parameters are discuss...
In this paper the equations of motion for charged particles in radio-frequency quadrupole lenses are studied, the transfer matrix elements are derived and the relations between the focusing properties of the lenses and the lens parameters are discuss...
Abstract:
The principle of beam energy measurement and its correction in synchrotrons are described. The formulas of beam energy correction for closed orbit distortion and dipole correctors are derived. The application of these formulas in the Beijing Electron...
The principle of beam energy measurement and its correction in synchrotrons are described. The formulas of beam energy correction for closed orbit distortion and dipole correctors are derived. The application of these formulas in the Beijing Electron...
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ISSN 1674-1137 CN 11-5641/O4
Original research articles, Ietters and reviews Covering theory and experiments in the fieids of
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- Cosmology
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Cover Story
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