БЕТАТРОННЫЕ КОЛЕБАН ИЯ В УСКОРИТЕЛЕ С ОБЩИМ ПОЛЕМ I

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Betatron oscillations in an accelerator with a general field I

The paper gives a linear theory of equilibrium trajectories in an accelerator with a generalized magnetostatic field, the components of which are defined on a general rotation surface. Equations of motion of the particles in natural coordinates are derived with respect to the change in energy and dissipative force. A system of equilibrium trajectories is found in the general form. Conditions for the field components on the reference surface, necessary for the existence of equilibrium trajectories, for the conservation of their geometric similarities and for maintaining the constancy of the frequencies of the betatron oscillations, are derived. A condition is also derived which must be satisfied by the reference surface in order to conserve constant circular frequency of the particles. It is seen that it is not possible to find a field for an accelerator with an exactly constant circular frequency and with constant frequencies of the betatron oscillation in the relativistic energy region. An ultra-relativistic cyclotron with such properties is realizable.

     

ЗАТУХАНИЕ КОЛЕБАНИЙ ЧАСТИЦ В ОБЩЕМ ПОЛЕ С ПЕРИОДИЧЕСКОЙ СТРУКТУРОЙ I

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The damping of particle oscillations in a general field with periodic structure I

A liner theory is derived, discussing the dynamics of particles in the region of an equilibrium orbit in a general electromagnetic field, which forms a periodic system. The total particle damping is determined from the Hamiltonian found and from dissipative forces brought out by a classical reaction radiation. Relations for the damping of the synchrotron oscillations are derived from the study of the appropriate phase space.

     

ОДНОНУКЛОННАЯ МОДЕЛ Ь ЯДРА. ЧАСТЬ I

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ВЛИЯНИЕ ДАВЛЕНИЯ HA ПО ГЛОЩЕНИЕ ГАЛОГЕНИДО В СЕРЕБРА I

Изучалось влияние да вления на границу nогл ощения чиСтых монокр исталлов AgBr, AgClи AgI.Поглощение изме рялоСь при температу ре ?180 °С. Обнаружено смеще ние границы поглощен ия в сторону ультраφиолетовой ча сти спектра. Смещение объясняется в соотно шении с работой Биллига [7],ра сширением запрещенн ой зоны вследствие умен ьшения постоянной ре шетки кристалла под влиянием давления.     

Спектралъный метод о пределения изотонно го состава свинца. Частъ I

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用I(I+1)展开式分析超形变带

用Bohr–MottelsonI(+1)展开四参数转动谱公式系统分析了A～190、150区的超形变转动带.结果表明:四参数ABCD公式能够相当好地描述上述两个区的超形变带,若干核第二类转动惯量J⁽²⁾的理论计算值与实验提取值符合较好;A～190区超形变带的四参数数值关系并不支持Harris公式及ab公式的理论预期值,但相对而言,ab公式的理论预期值与实验提取值更为接近.     

用I(I+1)展开式分析超形变带

用Bohr－MottelsonI（＋1）展开四参数转动谱公式系统分析了A～190、150区的超形变转动带．结果表明：四参数ABCD公式能够相当好地描述上述两个区的超形变带,若干核第二类转动惯量J(2)的理论计算值与实验提取值符合较好;A～190区超形变带的四参数数值关系并不支持Harris公式及ab公式的理论预期值,但相对而言,ab公式的理论预期值与实验提取值更为接近．     

К ТЕОРИИ СПОНТАННОЙ Н АМАГНИЧЕННОСТИ ТОНК ИХ СЛОЕВ. I. ЧАСТЬ

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Nuclear β-decay. I

In order to clarify the validity of the theory of nuclearβ-transition a new formulation is given. The nuclear properties are contained in form factors, arising from a decomposition of the matrix element of the V-A operator for nuclear states. The connection of these form factors with nuclear physics matrix elements is tabulated. The total transition amplitude can be written as an integral over these form factors folded with off-shell amplitudes for elastic and inelastic electron scattering on nuclei.     

光解CF3I研究I(52p1/2)的动力学

本实验用YAG激光器的四倍频光,光解CF3I得到I(52P1/2)。通过测量I(52P1/2)跃迁到基态而发出的1.315 μm荧光得到I(52P1/2)的自发辐射寿命为0.0370.005s,测得CF3I、O2、He对I(52P1/2)的猝灭常数分别为0.605Pa-1s-1,2 .25Pas-1及0.22Pas-1。     

Laser-induced-fluorescence Fourier transform spectrometry of the XOg+ state of I2: Extensive analysis of the BOu+ → XOg+ fluorescence spectrum of 127I129I and 129I2

An extensive rotational analysis of the vibrational levels of the XO_g⁺ state of ¹²⁷I¹²⁹I (5 ≤ v″ ≤ 110) and ¹²⁹I₂ (4 ≤ v″ ≤ 108) has been done from laser-induced-fluorescence analyzed with a Fourier transform spectrometer. The usual Dunham relationships are checked. For the range explored the lines can be recalculated with an accuracy better than 0.010 cm⁻¹ and even 0.005 cm⁻¹ for low J values. Checks are done from absolute hyperfine measurements.     

Vibro-Acoustics Vol.I and Ⅱ

<正>These two volumes can really be recommended to anyone interested in vibro-acoustics or the field of sound and vibration.The two volumes include 16 chapters and some 890 pages.The work is the result of cooperation between the Key Laboratory of Acoustics,The Chinese Academy of Sciences and The Royal Institute of Technology,KTH.The topic describes how structures are excited,energy flows from an excitation point to a sound radiating surface,and