Abstract

A beam of 7Li+ ions accelerated to 56 keV by an electromagnetic isotope separator was directed through a thin carbon foil. The emergent ions were in various charge and excitation states, from which 26 spectral lines of Li i and Li ii were identified. The decay times of eight stronger lines were measured in order to determine the mean lives of upper levels involved in the decays.

© 1969 Optical Society of America

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References

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  1. S. Bashkin, Nucl. Instr. Methods 28, 88 (1964).
    [CrossRef]
  2. W. S. Bickel, Appl. Opt. 6, 1309 (1967).
    [CrossRef] [PubMed]
  3. Charlotte E. Moore, Atomic Energy Levels, Vol. I. Natl. Bur. Std. (U.S.) Circ. 467. (U. S. Gov’t. Printing Office, Washington, D. C., 1949).
  4. G. Herzberg and H. R. Moore, Can. J. Phys. 37, 1293 (1959).
    [CrossRef]
  5. W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic Transition Probabilities, Vol. I. NSRDS-NBS 4 (U. S. Gov’t. Printing Office, Washington, D. C., 1966).
  6. B. M. Glennon and W. L. Wiese, Bibliography on Atomic Transition Probabilities and Supplement. Natl. Bur. Std. (U.S.) Misc. Publ. 278. (U. S. Gov’t. Printing Office, Washington, D. C., 1966, 1968).
  7. A. W. Weiss, Astrophys. J. 138, 1262 (1963).
    [CrossRef]
  8. F. Karstensen and J. Schramm, J. Opt. Soc. Am. 57, 654 (1967).
    [CrossRef]
  9. J. P. Buchet, A. Denis, J. Desesquelles, and M. Dufay, Compt. Rend. 265B, 471 (1967).
  10. I. Bergström, S. Thulin, N. Svartholm, and K. Siegbahn, Arkiv Fysik 1, 281 (1949).
  11. T. Alväger and J. Uhler, Arkiv Fysik 13, 145 (1958).
  12. J. D. Garcia and J. E. Mack, Phys. Rev. 138A, 987 (1965).
    [CrossRef]
  13. E. Holøien and S. Geltman, Phys. Rev. 153, 81 (1967).
    [CrossRef]
  14. J. P. Buchet, A. Denis, J. Desesquelles, and M. Dufay, Phys. Letters 28A, 529 (1969).
  15. W. S. Bickel, Appl. Opt. 7, 2367 (1968).
    [CrossRef] [PubMed]
  16. W. S. Bickel and A. S. Goodman, Phys. Rev. 148, 1 (1966).
    [CrossRef]

1969 (1)

J. P. Buchet, A. Denis, J. Desesquelles, and M. Dufay, Phys. Letters 28A, 529 (1969).

1968 (1)

1967 (4)

E. Holøien and S. Geltman, Phys. Rev. 153, 81 (1967).
[CrossRef]

W. S. Bickel, Appl. Opt. 6, 1309 (1967).
[CrossRef] [PubMed]

F. Karstensen and J. Schramm, J. Opt. Soc. Am. 57, 654 (1967).
[CrossRef]

J. P. Buchet, A. Denis, J. Desesquelles, and M. Dufay, Compt. Rend. 265B, 471 (1967).

1966 (1)

W. S. Bickel and A. S. Goodman, Phys. Rev. 148, 1 (1966).
[CrossRef]

1965 (1)

J. D. Garcia and J. E. Mack, Phys. Rev. 138A, 987 (1965).
[CrossRef]

1964 (1)

S. Bashkin, Nucl. Instr. Methods 28, 88 (1964).
[CrossRef]

1963 (1)

A. W. Weiss, Astrophys. J. 138, 1262 (1963).
[CrossRef]

1959 (1)

G. Herzberg and H. R. Moore, Can. J. Phys. 37, 1293 (1959).
[CrossRef]

1958 (1)

T. Alväger and J. Uhler, Arkiv Fysik 13, 145 (1958).

1949 (1)

I. Bergström, S. Thulin, N. Svartholm, and K. Siegbahn, Arkiv Fysik 1, 281 (1949).

Alväger, T.

T. Alväger and J. Uhler, Arkiv Fysik 13, 145 (1958).

Bashkin, S.

S. Bashkin, Nucl. Instr. Methods 28, 88 (1964).
[CrossRef]

Bergström, I.

I. Bergström, S. Thulin, N. Svartholm, and K. Siegbahn, Arkiv Fysik 1, 281 (1949).

Bickel, W. S.

Buchet, J. P.

J. P. Buchet, A. Denis, J. Desesquelles, and M. Dufay, Phys. Letters 28A, 529 (1969).

J. P. Buchet, A. Denis, J. Desesquelles, and M. Dufay, Compt. Rend. 265B, 471 (1967).

Denis, A.

J. P. Buchet, A. Denis, J. Desesquelles, and M. Dufay, Phys. Letters 28A, 529 (1969).

J. P. Buchet, A. Denis, J. Desesquelles, and M. Dufay, Compt. Rend. 265B, 471 (1967).

Desesquelles, J.

J. P. Buchet, A. Denis, J. Desesquelles, and M. Dufay, Phys. Letters 28A, 529 (1969).

J. P. Buchet, A. Denis, J. Desesquelles, and M. Dufay, Compt. Rend. 265B, 471 (1967).

Dufay, M.

J. P. Buchet, A. Denis, J. Desesquelles, and M. Dufay, Phys. Letters 28A, 529 (1969).

J. P. Buchet, A. Denis, J. Desesquelles, and M. Dufay, Compt. Rend. 265B, 471 (1967).

Garcia, J. D.

J. D. Garcia and J. E. Mack, Phys. Rev. 138A, 987 (1965).
[CrossRef]

Geltman, S.

E. Holøien and S. Geltman, Phys. Rev. 153, 81 (1967).
[CrossRef]

Glennon, B. M.

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic Transition Probabilities, Vol. I. NSRDS-NBS 4 (U. S. Gov’t. Printing Office, Washington, D. C., 1966).

B. M. Glennon and W. L. Wiese, Bibliography on Atomic Transition Probabilities and Supplement. Natl. Bur. Std. (U.S.) Misc. Publ. 278. (U. S. Gov’t. Printing Office, Washington, D. C., 1966, 1968).

Goodman, A. S.

W. S. Bickel and A. S. Goodman, Phys. Rev. 148, 1 (1966).
[CrossRef]

Herzberg, G.

G. Herzberg and H. R. Moore, Can. J. Phys. 37, 1293 (1959).
[CrossRef]

Holøien, E.

E. Holøien and S. Geltman, Phys. Rev. 153, 81 (1967).
[CrossRef]

Karstensen, F.

Mack, J. E.

J. D. Garcia and J. E. Mack, Phys. Rev. 138A, 987 (1965).
[CrossRef]

Moore, Charlotte E.

Charlotte E. Moore, Atomic Energy Levels, Vol. I. Natl. Bur. Std. (U.S.) Circ. 467. (U. S. Gov’t. Printing Office, Washington, D. C., 1949).

Moore, H. R.

G. Herzberg and H. R. Moore, Can. J. Phys. 37, 1293 (1959).
[CrossRef]

Schramm, J.

Siegbahn, K.

I. Bergström, S. Thulin, N. Svartholm, and K. Siegbahn, Arkiv Fysik 1, 281 (1949).

Smith, M. W.

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic Transition Probabilities, Vol. I. NSRDS-NBS 4 (U. S. Gov’t. Printing Office, Washington, D. C., 1966).

Svartholm, N.

I. Bergström, S. Thulin, N. Svartholm, and K. Siegbahn, Arkiv Fysik 1, 281 (1949).

Thulin, S.

I. Bergström, S. Thulin, N. Svartholm, and K. Siegbahn, Arkiv Fysik 1, 281 (1949).

Uhler, J.

T. Alväger and J. Uhler, Arkiv Fysik 13, 145 (1958).

Weiss, A. W.

A. W. Weiss, Astrophys. J. 138, 1262 (1963).
[CrossRef]

Wiese, W. L.

B. M. Glennon and W. L. Wiese, Bibliography on Atomic Transition Probabilities and Supplement. Natl. Bur. Std. (U.S.) Misc. Publ. 278. (U. S. Gov’t. Printing Office, Washington, D. C., 1966, 1968).

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic Transition Probabilities, Vol. I. NSRDS-NBS 4 (U. S. Gov’t. Printing Office, Washington, D. C., 1966).

Appl. Opt. (2)

Arkiv Fysik (2)

I. Bergström, S. Thulin, N. Svartholm, and K. Siegbahn, Arkiv Fysik 1, 281 (1949).

T. Alväger and J. Uhler, Arkiv Fysik 13, 145 (1958).

Astrophys. J. (1)

A. W. Weiss, Astrophys. J. 138, 1262 (1963).
[CrossRef]

Can. J. Phys. (1)

G. Herzberg and H. R. Moore, Can. J. Phys. 37, 1293 (1959).
[CrossRef]

Compt. Rend. (1)

J. P. Buchet, A. Denis, J. Desesquelles, and M. Dufay, Compt. Rend. 265B, 471 (1967).

J. Opt. Soc. Am. (1)

Nucl. Instr. Methods (1)

S. Bashkin, Nucl. Instr. Methods 28, 88 (1964).
[CrossRef]

Phys. Letters (1)

J. P. Buchet, A. Denis, J. Desesquelles, and M. Dufay, Phys. Letters 28A, 529 (1969).

Phys. Rev. (3)

W. S. Bickel and A. S. Goodman, Phys. Rev. 148, 1 (1966).
[CrossRef]

J. D. Garcia and J. E. Mack, Phys. Rev. 138A, 987 (1965).
[CrossRef]

E. Holøien and S. Geltman, Phys. Rev. 153, 81 (1967).
[CrossRef]

Other (3)

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic Transition Probabilities, Vol. I. NSRDS-NBS 4 (U. S. Gov’t. Printing Office, Washington, D. C., 1966).

B. M. Glennon and W. L. Wiese, Bibliography on Atomic Transition Probabilities and Supplement. Natl. Bur. Std. (U.S.) Misc. Publ. 278. (U. S. Gov’t. Printing Office, Washington, D. C., 1966, 1968).

Charlotte E. Moore, Atomic Energy Levels, Vol. I. Natl. Bur. Std. (U.S.) Circ. 467. (U. S. Gov’t. Printing Office, Washington, D. C., 1949).

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Figures (6)

Fig. 1
Fig. 1

Partial term scheme of Li i. The mean lives of the levels indicated with dots were measured in this experiment.

Fig. 2
Fig. 2

Partial term scheme of Li ii. The mean lives of the levels indicated with dots were measured in this experiment.

Fig. 3
Fig. 3

A partial spectral scan obtained from beam-foil excited lithium atoms.

Fig. 4
Fig. 4

The decays of the 5d 2D, 4d 2D, and 4s 2S levels in Li i.

Fig. 5
Fig. 5

The decays of the 3d 2D and 2p 2P levels in Li i.

Fig. 6
Fig. 6

The decays of the 2p 3P, 4f 3F, and 4f 1F levels in Li ii.

Tables (2)

Tables Icon

Table I Observed transition in Li i and Li ii.

Tables Icon

Table II Experimental and theoretical values for the mean lives and transition probabilities in Li i and Li ii.

Equations (4)

Equations on this page are rendered with MathJax. Learn more.

N i ( t ) = N i ( 0 ) exp ( - t / τ i ) ,
τ i - 1 = A i f .
τ i - 1 = f = 1 n A i f = α i ,
I i ( x λ ) = I i ( 0 λ ) exp ( - x / τ i v ) ,