Ion-impact-induced interatomic Coulombic decay in neon and argon dimers

Kim, H.-K.; Gassert, H.; Schöffler, M. S.; Titze, J.; Waitz, M.; Voigtsberger, J.; Trinter, Florian; Becht, Jasper; Kalinin, Anton; Neumann, N.; Zhou, Chunlin; Schmidt, L. Ph. H.; Jagutzki, O.; Czasch, A.; Merabet, H.; Schmidt‐Böcking, H.; Jahnke, T.; Cassimi, A.; Dørner, R.

doi:10.1103/physreva.88.042707

Cited by 41 publications

(43 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Of particular interest is the resonant ICD (RICD) where the precursor excitation to form an inner-shell vacancy is accomplished by promoting an inner electron to an excited state by an external stimulant, generally electromagnetic radiation [17,18] or, more recently, chargeparticle impact [21]. A theoretical study of RICD followed by Ne 2s → np excitations in MgNe clusters suggested the leading contribution of RICD among other interatomic decay modes [22].…”

mentioning

confidence: 99%

“…ICD followed by resonant Auger decay has been identified in Ar dimers using momentum resolved electron-ion-ion coincidence spectroscopy [10,11]. Ultrafast ICDs of a dicationic monomer in a cluster to produce a cluster tricataion [12] Of particular interest is the resonant ICD (RICD) where the precursor excitation to form an inner-shell vacancy is accomplished by promoting an inner electron to an excited state by an external stimulant, generally electromagnetic radiation [17,18] or, more recently, chargeparticle impact [21]. A theoretical study of RICD followed by Ne 2s → np excitations in MgNe clusters suggested the leading contribution of RICD among other interatomic decay modes [22].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Resonant Auger–intersite-Coulombic hybridized decay in the photoionization of endohedral fullerenes

Javani

Wise

et al. 2014

Phys. Rev. A

View full text Add to dashboard Cite

Considering the photoionization of Ar@C 60 , we predict resonant femtosecond decays of both Ar and C 60 vacancies through the continua of atom-fullerene hybrid final states. The resulting resonances emerge from the interference between simultaneous autoionizing and intercoulombic decay (ICD) processes. For Ar 3s → np excitations, these resonances are far stronger than the Ar-to-C 60 resonant ICDs, while for C 60 excitations they are strikingly larger than the corresponding Auger features. The results indicate the power of hybridization to enhance decay rates, and modify lifetimes and line profiles. [4] research has gone into studying ICD processes in weakly bound atomic systems. These involve the observation of ICD in rare gas dimers [5], rare gas clusters [6], surfaces [7], and small water droplets [8,9]. ICD followed by resonant Auger decay has been identified in Ar dimers using momentum resolved electron-ion-ion coincidence spectroscopy [10,11]. Ultrafast ICDs of a dicationic monomer in a cluster to produce a cluster tricataion [12] Of particular interest is the resonant ICD (RICD) where the precursor excitation to form an inner-shell vacancy is accomplished by promoting an inner electron to an excited state by an external stimulant, generally electromagnetic radiation [17,18] or, more recently, chargeparticle impact [21]. A theoretical study of RICD followed by Ne 2s → np excitations in MgNe clusters suggested the leading contribution of RICD among other interatomic decay modes [22]. Photoelectron spectroscopy with Ne clusters for 2s → np excitations measured the signature of RICD processes [17]. Similar excitations in the double photoionization of Ne dimers were utilized to observe RICD by tracking the formation of energetic Ne + fragments [18]. Most recently, strong enhancement of the HeNe + yield, as He resonantly couples with the radiation, is detected [19], confirming an earlier prediction [20].Atoms confined in fullerene shells forming endofullerene compounds are particularly attractive natural laboratories to study RICD processes. There are two compelling reasons for this: (i) such materials are highly stable, have low-cost sustenance at the room temperature and are enjoying a rapid improvement in synthesis techniques [23]; and (ii) the effect of correlation of the central atom with the cage electrons have been predicted to spectacularly affect the atomic photoionization [24]. A first attempt to predict ICD in endofullerenes was made by calculating ICD rates for Ne@C 60 [25]. While some speculation on the role of Coulomb interaction mediated energy transfer from atom to fullerene to broaden Auger lines has been made [26,27], no studies, theoretical or experimental, of RICD resonances in the ionization cross section of endofullerenes have been performed. Furthermore, ICD of endofullerene molecules can uncover effects not yet known. This is because: (i) endofullerenes being spherical analogues of asymmetric dimers consisting of an atom and a cluster can also induce reverse RICD processes, the decay of...

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

Resonant Auger–intersite-Coulombic hybridized decay in the photoionization of endohedral fullerenes

Javani

Wise

et al. 2014

Phys. Rev. A

View full text Add to dashboard Cite

show abstract

“…It can be induced by photoionization (see e.g. [2,3]), photoexcitation [9][10][11][12], Auger decay [13,14], ion impact [15][16][17], and electron impact [18] or as in the present case after shakeup [19]. The most extreme system for which ICD has been reported is the Helium dimer [20,21].…”

Section: Pacs Numbersmentioning

confidence: 99%

Interatomic-Coulombic-decay-induced recapture of photoelectrons in helium dimers

et al. 2014

Self Cite

View full text Add to dashboard Cite

We investigate the onset of photoionization shakeup induced interatomic Coulombic decay (ICD) in He2 at the He + * (n = 2) threshold by detecting two He + ions in coincidence. We find this threshold to be shifted towards higher energies compared to the same threshold in the monomer. The shifted onset of ion pairs created by ICD is attributed to a recapture of the threshold photoelectron after the emission of the faster ICD electron. PACS numbers:Excited ions can get rid of their excess energy via the emission of a photon or an electron. If, however, the excited atom is spatially close to other atoms and the excitation energy is above the ionization threshold of this neighbor, the excess energy can also be transfered to the neighbor where it leads to emission of an electron. This energy transfer process is termed interatomic Coulombic decay (ICD). It was introduced by Cederbaum and coworkers in 1997 [1] and was demonstrated experimentally first for Neon clusters [2] and Neon dimers [3]. The related interatomic Auger transitions in solid matter have ofen been discussed, but broad valence bands, surface/bulk differences and significant electron energy-loss processes do typically preclude a clear assignment of this process for solids. Many studies have shown since then that ICD is a very general phenomenon occuring in van der Waals bound (see e.g. [2][3][4][5]) and hydrogen bound systems (see e.g. [6][7][8]). It can be induced by photoionization (see e.g. [2,3]), photoexcitation [9][10][11][12], Auger decay [13,14], ion impact [15][16][17], and electron impact [18] or as in the present case after shakeup [19]. The most extreme system for which ICD has been reported is the Helium dimer [20,21]. The neutral He dimer is very weakly bound (about 95 neV) and the internuclear distance extends to very large distances, with the mean * Electronic address: doerner@atom.uni-frankfurt.de distance of about 52Å. ICD in He 2 can occur when one of the Helium atoms is ionized and its remaining electron is shaken up to any excited state (He + * (n=2,3...)). In the next step, the He + * (n=2)He contracts and during that nuclear motion it undergoes ICD. The electron of the exited He + relaxes to the ground state and the energy is transfered to the neutral neighbor where the ICD electron is emitted. Finally, the two He + ions Coulomb explode back-to-back: He-He hν −→ He + * -He + e ph ICD − −− → He + + He + + e ph + e ICD Usually, ICD and the subsequent Coulomb explosion is discussed in a two step picture, where the decay is independent from the initial ionization/excitation process. In the present work, we show that close to the ionization/excitation threshold this two step approximation breaks down. Photoelectron and ICD electron interaction can lead to recapture of the photoelectron into a bound state of one of the two ions, which quenches the Coulomb explosion. A direct link between the ionization process and ICD has been discussed in two contexts in the literature so far. The first is the recoil effect, where it has been shown ex...

show abstract

“…This is, however, not the only reaction pathway through which two ions can be created [11,[23][24][25][26]. According to the nomenclature used in [23] the sequential ionization discussed so far is referred to as CE.…”

Section: Fragmentation Mechanismsmentioning

confidence: 99%

Orientation dependence in multiple ionization ofHe2andNe2induced by fast, highly charged ions: Probing the impact-parameter-dependent ionization probability in 11.37-MeV/uS
Kim
¹
,
Gassert
²
,
Titze
³

et al. 2014
Phys. Rev. A
Self Cite
20
0
8
0
View full text Add to dashboard Cite

We investigate orientation effects in the fragmentation of He 2 and Ne 2 induced by S 14+ projectiles at an impact energy of 11.37 MeV/u. Multiple ionization shows a strong dependence on the orientation of the dimer axis with respect to the projectile beam axis. We attribute these effects to the impact-parameter-dependent ionization probability P (b) for the atomic scattering process S 14+ + He and S 14+ + Ne and compare our data with a Monte Carlo simulation.

show abstract

Ion-impact-induced interatomic Coulombic decay in neon and argon dimers

Cited by 41 publications

References 65 publications

Resonant Auger–intersite-Coulombic hybridized decay in the photoionization of endohedral fullerenes

Resonant Auger–intersite-Coulombic hybridized decay in the photoionization of endohedral fullerenes

Interatomic-Coulombic-decay-induced recapture of photoelectrons in helium dimers

Orientation dependence in multiple ionization ofHe2andNe2induced by fast, highly charged ions: Probing the impact-parameter-dependent ionization probability in 11.37-MeV/uS
Kim
¹
,
Gassert
²
,
Titze
³

et al. 2014
Phys. Rev. A
Self Cite
20
0
8
0
View full text Add to dashboard Cite

Contact Info

Product

Resources

About

Ion-impact-induced interatomic Coulombic decay in neon and argon dimers

Cited by 41 publications

References 65 publications

Resonant Auger–intersite-Coulombic hybridized decay in the photoionization of endohedral fullerenes

Resonant Auger–intersite-Coulombic hybridized decay in the photoionization of endohedral fullerenes

Interatomic-Coulombic-decay-induced recapture of photoelectrons in helium dimers

Orientation dependence in multiple ionization ofHe2andNe2induced by fast, highly charged ions: Probing the impact-parameter-dependent ionization probability in 11.37-MeV/uSKim1, Gassert2, Titze3 et al. 2014Phys. Rev. ASelf Cite20080View full textAdd to dashboardCite

Contact Info

Product

Resources

About

Orientation dependence in multiple ionization ofHe2andNe2induced by fast, highly charged ions: Probing the impact-parameter-dependent ionization probability in 11.37-MeV/uS
Kim
¹
,
Gassert
²
,
Titze
³

et al. 2014
Phys. Rev. A
Self Cite
20
0
8
0
View full text Add to dashboard Cite