-
公开(公告)号：US3898501A
公开(公告)日：1975-08-05
申请号：US46852874
申请日：1974-05-09
Applicant: HITACHI LTD
Inventor： HOSOYA AKIRA , TADOKORO MAKOTO , TOMITA SADAMI , ARAI YOJI , MAYAMA SHINJI
CPC classification number: H01J17/066 , H01J2893/0066
Abstract: In a lamp used as light source for atomic light absorption analysis, comprising a cathode having a hollow therein, an anode disposed in the vicinity thereof, a hermetical envelope to enclose the cathode and the anode, and gaseous atmosphere contained in envelope, the cathode is formed of an alloy composed of silver and at least one metal having a melting point equal to or lower than 500*C and emitting the same spectral line as the metal to be analyzed so that the cathode is prevented from being deformed and the luminous intensity and the analytic accuracy are improved.
Abstract translation: 在用作原子光吸收分析的光源的灯中，包括其中具有中空的阴极，设置在其附近的阳极，包围阴极和阳极的气密外壳以及包封在气体中的气体，阴极是 由银和至少一种熔点等于或低于500℃的金属组成的合金形成，并且发射与待分析的金属相同的光谱线，从而防止阴极变形，并且发光强度和 分析精度提高。
-
公开(公告)号：US3851213A
公开(公告)日：1974-11-26
申请号：US30051072
申请日：1972-10-25
Applicant: PHILIPS CORP
Inventor： VAN DAM H , VAN GELDER Z
Abstract: An arrangement for generating modulated atomic resonance radiation includes a rare-gas filled discharge vessel provided with a window passing the generated resonance radiation, two electrodes between which a positive column discharge is maintained during operation of the arrangement and at least one hollow sputtering electrode which includes the element whose resonance radiation is desired. The arrangement includes means for applying a first pulsatory voltage to the sputtering electrode and furthermore means for applying a second pulsatory voltage to the electrodes for the positive column discharge, in which the pulse repetition frequency f for both pulsatory voltages is equal and has a value of between 10 and 104 Hz. The product of pulses repetition frequency f and pulse duration T1 of the first pulsatory voltage has a value of between 0.5 and 10 4 and the second pulsatory voltage has a delay time Tau relative to the first pulsatory voltage in which 0
Abstract translation: 用于产生调制原子共振辐射的装置包括设置有通过所产生的共振辐射的窗口的稀有气体填充放电容器，在该装置的操作期间保持正柱排出的两个电极和至少一个中空溅射电极，其包括 需要共振辐射的元件。 该装置包括用于向溅射电极施加第一脉动电压的装置，此外还用于向用于正列放电的电极施加第二脉冲电压的装置，其中两个脉动电压的脉冲重复频率f相等，并且具有 在10和104Hz之间。 第一脉动电压的脉冲重复频率f和脉冲持续时间T1的乘积具有在0.5和10 -4之间的值，并且第二脉动电压具有相对于第一脉动电压的延迟时间τ，其中0 <τ< 2T1。
-
公开(公告)号：US3629916A
公开(公告)日：1971-12-28
申请号：US3629916D
申请日：1970-04-27
Applicant: PERKIN ELMER CORP
Inventor： VOLLMER JOHN W , PELLIER LAURENCE
CPC classification number: H01J61/09
Abstract: A type of spectral source lamp has a hollow cup-shaped cathode, the interior of which is coated with the spectrally emitting element or elements. A technique for forming such a coating of an alloy of an alkali metal (or metals), with, say, tin in the presence of some boron is proposed, (resulting in higher melting points and lower vapor pressures, thereby allowing higher operating lamp currents and consequent spectral radiation intensity). The coating material may be conformed directly on the interior of the cathode cup (say, of titanium) by fusing an alkali metal borohydride with tin, thereby avoiding the need to handle pure alkali metal. The hydrogen gas liberated during alloy formation removes some of the contaminants (e.g., oxides). A boron-containing, glassy slag may be readily separated from the alkali metal alloys. Specific examples in which the alkali metal component is sodium, potassium, or a mixture of sodium and potassium are disclosed. The other metal may be, for example, tin or lead.
-
公开(公告)号：US3089054A
公开(公告)日：1963-05-07
申请号：US6291460
申请日：1960-10-17
Applicant: COMMW SCIENT IND RES ORG
Inventor： ALAN WALSH , GEORGE JONES WILLIAM
-
-
-
Search Results
84
records
(took 0.008 seconds)
