,DETERMINATION OF THE LIFETIME OF THE 4p1P0 STATE OF CALCIUM BY ELECTRON PHOTON COINCIDENCE

来源 :中国物理(英文版) | 被引量 : 0次 | 上传用户:qnwy2051
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The electron-photon delayed coincidence technique has been used to measure precisely the lifetime for the 4p1P0 state in calcium. The lifetime of this state was obtained by measuring the time correlation spectrum between the inelastically scattered electrons and the corresponding de-excitation photons. By using the least-squares fitting program to fit Gale’s equation to the data points, a value of (4.15±0.17) ns was obtained. The result was compared to some of the earlier experimental measurements.
其他文献
This paper deals with the absorption spectra of a weak probe in a four-level Doppler-broadened system driven bythree coherent fields. The main aim is to extend
舞蹈是一种以肢体语言为表达方式的艺术形式。它通过舞蹈形象表达舞蹈者的思想和内心的情感。从其表现形式来讲,“动”是舞蹈的核心。事实上,在舞蹈艺术中,肢体语言只是一种
We have constructed a new kind of two-mode bosonic realization of SU(1,1) Lie algebra, on the basis of which the SU(1,1) generalized coherent states in the two-
After a Birkhoff system is restricted by constraints, the determining equations, the Lie symmetries, the structureequation and the form of conserved quantities
In this paper we first discuss the asymptotic behaviours of solitary impulses in reaction-diffusion equations of Oregonator under the equal, single and double d
The effect of divalent cation substitution on the structure and magnetic properties of La1.2Sr1.8-xCaxMn2O7 (x = 0-0.900) is investigated in this paper. Partly
公共艺术是一种新生的提法。其“公共性”在艺术出现的那一刻即存在了,“公共性”简言之,就是能引发公众讨论的艺术。艺术的公开性、分享性和传播性,以及伴随而来的人类对此
A new type of partial-dielectric-loaded helical groove slow-wave structure (SWS) for millimetre wave travellingwave tube (TWT) is presented in this paper. The r
With the discrete method of the hexagonal cell and three different velocities of particle population in each cell,a two-dimensional lattice Boltzmann model is d
In view of making the best use of information coming from past observational data, a new difference scheme with multi-time levels (p >3) is suggested. Some mathe