| becquerel (Bq) | 
| Antoine-Henri Becquerel (1852–1908) |
|---|
| becquerel (Bq) |
| Antoine-Henri Becquerel (1852–1908) |
|---|
A.H. Becquerel was a French physicist, Nobel Prize winner and the grandson of Antoine César Becquerel. In his Mémoire sur la polarisation atmosphérique et l'influence du magnétisme terrestre sur l'atmosphère (Bern, Dibner, 1880) he suggested that particles from the sun moving along the Earth's magnetic field lines caused electric currents which were the source of the aurora and polar magnetic disturbances. This supported earlier work on the aurora by researchers such as Ørsted and Gauss.
To honour his scientific work, Becquerel's name was given to the SI (International System of Units) unit of radioactivity: becquerel, symbol Bq, equal to one reciprocal second.
| Country | Catalog Number | Type of Item | Year of Issue | Notes on Content |
|---|---|---|---|---|
| Comoro Islands | 257 (Mi349) | 1977 | Nobel Prize, 1903: Becquerel (second from left), (mis-spelled "Beckerel" in text) | |
| Comoro Islands | 257a (BL94) | SS1 (257) | ||
| Comoro Islands | Mi594 | 257 overprinted | 1979 | Nobel Prize, 1903: Becquerel (second from left), (mis-spelled "Beckerel" in text) |
| Comoro Islands | Mi594 double | 257 double overprinted | ||
| France | B202 (Mi745) | 1946 | "Henri Becquerel" | |
| France | B202 maxi1 | Maxicard | ||
| France | B202 maxi2 | Maxicard (different) | ||
| France | B202 maxi3 | Maxicard (different) | ||
| France | B202 proof | Artist's proof | ||
| Gabon | Unknown ms (Mi none) Unknown ims | MS2 (a-b) Imperforate MS2 (a-b) [known illegal issue] | 2014 | "Henri Becquerel" |
| Gabon | Unknown fdc1 | MS2 and (multi-color printed) cachet on FDC | ||
| Gabon | Unknown fdc2 | MS2 and (multi-color printed) cachet (different) on FDC | ||
| Guinea Republic | 2135 (BL741, Mi3846) | SS1 | 2002 | 100th anniv. Nobel Prizes; (150th anniv. birth) "Antoine Henry Becquerel" |
| Guinea Republic | BL1598A BL1598B | In (upper) margin of SS1 In (upper) margin of imperforate SS1 | 2008 | "Antoine Becquerel"; (100th anniv. death) |
| Guinea Republic | BL1598A misperf | Mis-perforated | ||
| Guinea Republic | BL1598A fdc | SS1 on FDC | ||
| Guinea-Bissau | Mi3988A Mi3988B | One of MS6 (Mi3986A-3991A) One of imperforate MS6 (Mi3986B-3991B) | 2008 | "Henri Becquerel"; (100th anniv. death) |
| Guinea-Bissau | Mi4230 | One of MS6 (Mi4230-4235) | 2009 | (100th anniv. death, in 2008) "Antoine Henri Becquerel" |
| Guinea-Bissau | Mi4230-4235_ms6 fdc | MS6 on FDC | ||
| Guyana | 3007a (Mi5384) | One of MS9 (3007 (a-i)) (Mi5384-5392) | 1995 | Nobel Prize, 1903: Becquerel |
| Ivory Coast | Unknown b (Mi none) | One of MS2 (a-b) [known illegal issue] | 2017 | "Antoine Henry Becquerel" |
| Ivory Coast | Unknown fdc | MS2 on FDC | ||
| Maldive Islands | 2117d (Mi2495) | One of MS9 (2117 (a-i)) (Mi2492-2500) | 1995 | Nobel Prize, 1903: "Antoine Henry Becquerel" |
| Mali | Unknown b (Mi none) | One of MS2 (a-b) [known illegal issue] | 2011 | (160th anniv. birth, in 2012) "Henri Becquerel" |
| Mali | Unknown fdc | MS2 and (brown printed) cachet on FDC | ||
| Romania | None | (Pictorial) cancel on stamped envelope | 2003 | "A.H. Becquerel" |
| Romania | None | (Pictorial) cancel and (black printed) cachet on cover | ||
| Romania | None | (Pictorial) cancel on cover | ||
| Romania | None | (Pictorial) cancel and (multi-color printed) cachet on postal card | ||
| Spain | None | (Multi-color printed) cachet on (un-canceled) (Spanish Post) stamped envelope (from 2011) | 2013 | "A. Henri Becquerel" |
| Sweden | 638 (Mi514) | 1963 | Nobel Prize, 1903: "Becquerel" | |
| Sweden | 637-638 fdc | One of two different stamps and (red and green and black printed) cachet on FDC (Stockholm cancel) | ||
| Sweden | 637-638 fdc2 | One of two different stamps and (red and green and black printed) cachet on FDC (Moskosel cancel) | ||
| Sweden | 637-638 fdc3 | One of two different stamps on FDC (blank/no cachet), also insert | ||
| Sweden | 638a (Mi513DD) | Coil strip of 5 (5x 638), perforated vertically | ||
| Sweden | 637-638 fdc4 | One of two different stamps on FDC (SESAM no.3 cachet) | ||
| Sweden | 637-638 fdc5 | One of two different stamps and (multi-color printed) cachet on FDC | ||
| Sweden | 639b | Booklet outside, also inside and booklet pane of 20 (20x 639) [no Becquerel on 639] |
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