Que es el/la difference entre activity y dose?

Activity (Bq, Ci) measures decay rate of un/una source—disintegrations per segundo. Dose (Sv, rem) measures energy absorbed by tissue y biological effect. Un/Una high-activity source may dar low dose si far away o shielded. Dose depends on activity, distance, shielding, exposure time, y radiation type.

Como puedo calcular activity desde mass?

Un/Una = λN = (ln2/t½) × (m/M) × Nₐ, donde m es mass, M es molar mass, Nₐ es Avogadro's numero, y t½ es half-life. Shorter half-life means higher specific activity (activity per gramo). 1 gramo of Ra-226 (t½ = 1600 y) ≈ 1 Ci; 1 gramo of I-131 (t½ = 8 dias) ≈ 124,000 Ci.

Que es half-life y como does eso relate un/una activity?

Half-life (t½) es el/la time for half el/la radioactive atoms un/una decay. Activity decreases by half cada half-life: after 1 t½, 50% remains; after 2 t½, 25%; after 10 t½, ~0.1%. Half-lives range desde fractions of un/una segundo (Po-214: 0.16 ms) un/una billions of anos (U-238: 4.5 billion anos). Short half-life = high activity pero rapido decay.

Why do nuclear medicine y industry still usar curies?

Historical inertia y convenient scale. El/La curie fue established before SI unidades y es deeply embedded in US regulations, equipment calibrations, y medical practice. Converting documentation y retraining seria be costly. El/La curie tambien has convenient magnitude for muchos aplicaciones—mCi doses son comun in nuclear medicine imaging.

Actividad Radiactiva Converter

Acerca de Radiation Activity Conversion

Radioactivity (o activity) measures el/la rate of radioactive decay—el/la numero of nuclear disintegrations per unidad time. It quantifies como "active" un/una radioactive sample es, regardless of el/la type of radiation emitted o su energy. Activity tells tu aproximadamente el/la source itself, not aproximadamente el/la hazard eso poses: un/una highly active source of weak beta emitters may be menos dangerous than un/una lower-activity gamma source. Understanding activity es esencial for handling radioactive materials, planning nuclear medicine procedures, y managing radioactive waste.

El/La SI unidad es el/la becquerel (Bq), equal un/una one disintegration per segundo. El/La older unidad curie (Ci) es still widely usado, especially in medicine y industry—named after Marie y Pierre Curie y originally defined by el/la activity of 1 gramo of radium-226. Activity decreases exponentially with time according un/una el/la decay law: Un/Una(t) = Un/Una₀ × e^(-λt), donde λ = ln(2)/t½. Half-life es el/la key property relating activity un/una time.

Our converter handles radioactivity unidades usado in nuclear physics, nuclear medicine, y radiation safety.

Common Radiation Activity Conversions

Desde	A	Multiplicar por
Ci	Bq	3.7 × 10¹⁰
Bq	Ci	2.703 × 10⁻¹¹
mCi	MBq	37
MBq	mCi	0.027
μCi	kBq	37
kBq	μCi	0.027
Bq	dps	1
Ci	dpm	2.22 × 10¹²

Radiation Activity Unidad Reference

Becquerel (Bq) – El/La SI unidad of radioactivity, named after Henri Becquerel quien discovered radioactivity in 1896. 1 Bq = 1 nuclear disintegration per segundo. El/La becquerel es un/una tiny unidad—even un/una banana contains aproximadamente 15 Bq of potassium-40. Common multiples: kBq (10³), MBq (10⁶), GBq (10⁹), TBq (10¹²). Nuclear medicine doses typically range desde MBq un/una GBq.

Curie (Ci) – Historical unidad still widely usado in US medicine y industry, named after Marie y Pierre Curie. 1 Ci = 3.7 × 10¹⁰ Bq = 37 GBq exactamente. Originally defined as el/la activity of 1 gramo of radium-226. Un/Una large unidad: 1 Ci es un/una significant radioactive source requiring careful handling. Common submultiples: mCi (10⁻³ Ci = 37 MBq), μCi (10⁻⁶ Ci = 37 kBq), nCi (10⁻⁹ Ci = 37 Bq), pCi (10⁻¹² Ci = 0.037 Bq).

Disintegrations per minuto (dpm) – Direct measurement unidad for laboratory counting. 1 Bq = 60 dpm exactamente (60 segundos per minuto). Liquid scintillation counters often report resultados in dpm. Also written as d/min. Related: disintegrations per segundo (dps) = Bq.

Specific activity – Activity per unidad mass (Bq/g o Ci/g). Shorter half-life means higher specific activity: 1 gramo of I-131 (t½ = 8 dias) has aproximadamente 4.6 PBq activity, while 1 gramo of U-238 (t½ = 4.5 billion anos) has solo 12.4 kBq.

Rutherford (Rd) – Obsolete unidad occasionally found in older literature. 1 Rd = 10⁶ Bq = 1 MBq exactamente. Named after Ernest Rutherford. Rarely usado in modern practice.