The discrete variable representation ( dvr ) scheme is applied to investigate the photoelectron spectrum ( pes ) of multiphoton ionization for some diatomic molecules in strong fields 摘要采用離散變量表示( dvr )方案研究了雙原子分子在強(qiáng)場下的多光子電離光電子能譜,得到了與實(shí)驗(yàn)相同的結(jié)果。
With the intensity of laser increased a series of new phenomena appears , for example , multiple photon lonization ( mpi ) , above threshold lonization ( ati ) , tunnel lonization ( tl ) , stable lonization ( si ) and so on 隨著激光強(qiáng)度的增加,會出現(xiàn)一系列的新現(xiàn)象,例如多光子電離,隧穿電離,閾上電離和穩(wěn)定化電離等現(xiàn)象。
4 . we attempted to carry out the experiment of co a3 ( v = 18 ) / d1 ( v = 10 ) collision with he in a static cell using oodr - mpi technique for the preparation of doing experiment in a molecular beam machine . in the experiment of 2 + 1 ' + 1 " two - color rempi , we conformed the accidental predissociation of co ( e1 , v = l ) state , and studied the effect of the accidental predissociation of co ( e1 , v = 1 ) state for different rotational states 4 .為了在分子束實(shí)驗(yàn)條件下進(jìn)行實(shí)驗(yàn),用光學(xué)一光學(xué)雙共振多光子電離光譜( oonr一mpi )的方法,在靜態(tài)池條件下,對較長壽命的eo ( a ’ n , v = 18 ) / ( d ’ , v = 10 )單重態(tài)一三重態(tài)之間的碰撞傳能實(shí)驗(yàn)進(jìn)行了嘗試。
The propagation of ultrashort laser pulse in air is analyzed with mechanics analogy by considering kerr effects and free electron defocusing . the equation describing the evolution of the laser spot is derived . it is shown that long distance focusing requires large initial beam and the propagation distance is very sensitive to the initial divergence angle of the laser beam 考慮多光子電離效應(yīng)和光學(xué)kerr效應(yīng),首次利用力學(xué)類比的方法研究了超短脈沖激光在電離氣體中的傳輸,詳細(xì)分析了傳輸距離與激光初始光斑、初始發(fā)散角以及激光功率的關(guān)系,提出了實(shí)現(xiàn)長距離傳輸?shù)臈l件。
( 3 ) the possible mechanism of dissociation / ionization is analyzed , ( 4 ) it is shown that the main dissociation channel is non - resonant photodissociation of parent molecule followed by the further photodissociation or photoionization of the fragments . in chapter six , the rempi - tof - ms of acetaldehyde are investigated in the range of 279 . 5 - 286 . 5nm . the main results are : ( 1 ) the tof - ms and rempi spectrum of acetaldehyde are measured 第六章主要報(bào)道了乙醛分子在279 . 5一286 . 5nm范圍內(nèi)的共振增強(qiáng)多光子解離一電離過程的實(shí)驗(yàn)研究結(jié)果和分析結(jié)果,主要內(nèi)容有: ( l )實(shí)驗(yàn)測定了乙醛分子的共振增強(qiáng)多光子電離的tof質(zhì)譜和分質(zhì)量的既mpi譜。
In chapter five , the rempi - tof - ms of methanol are investigated in the range of 279 . 5 - 286 . 5nm . the main results are : ( 1 ) the tof - ms and rempi spectrum of methanol are measured . ( 2 ) the tof - ms of methanol is identified ; the rempi spectrum of c , ch3 and ch2o are analyzed 第五章主要報(bào)道了甲醇分子在279 . 5一286 . 5nm范圍內(nèi)的共振增強(qiáng)多光子解離一電離過程的實(shí)驗(yàn)研究結(jié)果和分析結(jié)果,主要內(nèi)容有: ( 1 )實(shí)驗(yàn)測定了甲醇分子的共振增強(qiáng)多光子電離的tof質(zhì)譜和分質(zhì)量的rempi譜。
( 2 ) the tof - ms of acetaldehyde is identified ; the rempi spectra of c , ch , and ch3 are analyzed . ( 3 ) the possible mechanism of dissociation / ionization is analyzed , ( 4 ) it is also proposed that the main dissociation channel is non - resonant photodissociation of parent molecule followed by the further photodissociation or photoionization of the fragments ( 3 )通過對實(shí)驗(yàn)測定的tof質(zhì)譜和分質(zhì)量的rempi一譜的分析,討論了乙醛分子的多光子共振解離一電離通道以及碎片的解離通道,分析結(jié)果表明乙醛分子的主要解離通道是該分子先多光子解離,然后是解離碎片的進(jìn)一步解離或多光子電離。