Details
| Original language | English |
|---|---|
| Pages (from-to) | 541-544 |
| Number of pages | 4 |
| Journal | Surface Review and Letters |
| Volume | 3 |
| Issue number | 1 |
| Publication status | Published - Feb 1996 |
| Externally published | Yes |
Abstract
The delayed electron emission of negatively charged tungsten clusters has been investigated on a time scale from 1 to 500 ms. After being stored in a Penning trap clusters ions W-n (4 ≤ n ≤ 14, 18 ≤ n ≤ 20) were heated via multiphoton absorption (hv = 1.81 eV). In contrast to alkali and coinage metals no photofragmentation could be detected. Instead, for all cluster sizes studied so far only a decrease in the initial ion intensity as a function of time after excitation was observed. This decrease is not caused by ion loss from the trap, but has to be attributed to neutralization via delayed electron emission. The presented results strongly suggest that this process can be viewed as "thermionic emission" known from bulk-metal surfaces.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Materials Science(all)
- Surfaces, Coatings and Films
- Materials Science(all)
- Materials Chemistry
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In: Surface Review and Letters, Vol. 3, No. 1, 02.1996, p. 541-544.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Delayed electron emission of negatively charged tungsten clusters
AU - Weidele, H.
AU - Becker, Stefan
AU - Kluge, H. J.
AU - Lindinger, M.
AU - Schweikhard, L.
AU - Walther, Clemens
AU - Ziegler, J.
AU - Kreisle, D.
PY - 1996/2
Y1 - 1996/2
N2 - The delayed electron emission of negatively charged tungsten clusters has been investigated on a time scale from 1 to 500 ms. After being stored in a Penning trap clusters ions W-n (4 ≤ n ≤ 14, 18 ≤ n ≤ 20) were heated via multiphoton absorption (hv = 1.81 eV). In contrast to alkali and coinage metals no photofragmentation could be detected. Instead, for all cluster sizes studied so far only a decrease in the initial ion intensity as a function of time after excitation was observed. This decrease is not caused by ion loss from the trap, but has to be attributed to neutralization via delayed electron emission. The presented results strongly suggest that this process can be viewed as "thermionic emission" known from bulk-metal surfaces.
AB - The delayed electron emission of negatively charged tungsten clusters has been investigated on a time scale from 1 to 500 ms. After being stored in a Penning trap clusters ions W-n (4 ≤ n ≤ 14, 18 ≤ n ≤ 20) were heated via multiphoton absorption (hv = 1.81 eV). In contrast to alkali and coinage metals no photofragmentation could be detected. Instead, for all cluster sizes studied so far only a decrease in the initial ion intensity as a function of time after excitation was observed. This decrease is not caused by ion loss from the trap, but has to be attributed to neutralization via delayed electron emission. The presented results strongly suggest that this process can be viewed as "thermionic emission" known from bulk-metal surfaces.
UR - http://www.scopus.com/inward/record.url?scp=0003377881&partnerID=8YFLogxK
U2 - 10.1142/S0218625X9600098X
DO - 10.1142/S0218625X9600098X
M3 - Article
AN - SCOPUS:0003377881
VL - 3
SP - 541
EP - 544
JO - Surface Review and Letters
JF - Surface Review and Letters
SN - 0218-625X
IS - 1
ER -