Abstract
Aluminum thin films containing helium microbubbles produced by He+-ion implantation have been investigated by ultraviolet absorption and electron-energy-loss spectroscopies in the range 1-30 eV. The shape and position of the 1S01-nP11 helium line series and several Al plasmon bands are discussed in terms of the physical state of helium in the bubbles. Results imply helium densities 3 to 6 times that of liquid He at 2°K and 1 bar pressure.
Original language | English |
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Pages (from-to) | 1220-1223 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 46 |
Issue number | 18 |
DOIs | |
Publication status | Published - 4 May 1981 |
Externally published | Yes |